Amsterdam, produced by the Dutch company Royal Talens, is distinguished by its Standard Series philosophy. While Golden and Liquitex compete for the high-end professional market, Amsterdam dominates the "advanced student" and muralist market by offering massive volume at accessible prices without sacrificing archival stability. Their medium catalog is defined by the "100% Acrylic Resin" promise (even in their budget lines) and their specialty mediums designed for mixed media and craft integration.1. Acrylic Medium (The Universal Thinner)This is the workhorse of the Amsterdam catalog, designed to replace water as the primary thinner for their Standard Series paints.Binder Reinforcement: Amsterdam paints are famous for their medium viscosity. When thinning them for washes, using water breaks the binder. This medium adds pure acrylic resin back into the mix, ensuring that even very thin washes remain waterproof and durable once dry.Gloss & Matte: It is available in distinct gloss and matte finishes. A technical note for this brand is that the Matte Medium contains a very fine silica agent that can slightly "frost" dark colors if applied too thickly, so it is best used mixed with paint rather than as a topcoat.2. Pouring Medium (The European Fluid System)Amsterdam produces one of the most popular pouring mediums in the world, designed specifically to work with their Standard Series ink and tube paints.Self-Leveling Viscosity: Unlike the "honey" consistency of Liquitex Pouring Medium, Amsterdam's version is slightly thinner and more fluid. Flexible Film: It dries to a flexible, high-gloss film that resists crazing (cracking) even when pooled. It is chemically engineered to hold the distinct pigments of the Amsterdam line in suspension without muddying.3. Photo Transfer Gel (The Printmaker)Amsterdam is one of the few major brands to market a dedicated gel specifically for transferring laser prints onto canvas.Paper Dissolution: While you can technically use any gloss gel for transfers, this specific formula is engineered with a slightly higher acid content and lower tack. This allows the paper pulp to be rubbed off easily with water after drying, leaving the ink embedded in the acrylic film without tearing the image.Direct Application: It allows artists to incorporate photography directly into their paintings, effectively turning a laser print into an acrylic skin.4. Acrylic Binder (The Raw Ingredient)Uniquely for a brand in this price tier, Amsterdam sells their Pure Acrylic Binder in large jars as a standalone product.DIY Paint Making: This is the exact same resin used to make their tube paints. It allows artists to mix their own colors using dry pigments.Pre-Sizing: It is often used as a clear gesso or sizing for sealing wood and concrete before painting. Because it has no matting agents or fillers it dries crystal clear, sealing the surface without changing its visual texture.5. Specialty Effect MediumsAmsterdam focuses heavily on "fun" effects that bridge the gap between fine art and craft.Glow in the Dark Medium: A phosphorescent gel that can be mixed with transparent colors. It absorbs light and emits a green glow in the dark.Pumice Medium: A gritty, grey texture gel used to create concrete-like surfaces. It is significantly coarser than standard sand gels, making it excellent for industrial textures.Pearl Medium: Adds a pearlescent shimmer to standard colors, utilizing tiny mica flakes to create interference effects.Technical SummaryThe Amsterdam medium catalog is a volume-oriented collection characterized by versatility. They are the "everyman's" professional medium—offering the raw acrylic binder for purists, the Pouring Medium for fluid artists, and the Photo Transfer Gel for mixed media collagists. They are optimized for artists who need reliable, archival chemistry in large quantities (often sold in 1000ml pots) for experimentation and large-scale work.

Blick Art Materials is the largest art supply retailer in the United States, and their proprietary "house brand" is technically distinguished by its value-to-performance ratio. Unlike manufacturing giants like Golden or Liquitex that focus on patented polymer innovation, Blick partners with major manufacturers to produce "white label" mediums that replicate industry standards at a significantly lower price point. Their catalog is defined by two distinct tiers: the Blick Studio line (for students and volume) and the Blick Artists' line (for professional consistency).1. Blick Artists’ Acrylic Mediums (The Professional Tier)This line is engineered to compete directly with Golden and Liquitex professional mediums. It uses 100% acrylic polymer emulsion without the fillers found in student-grade alternatives.Gloss & Matte Mediums: These are the workhorse fluids of the Blick catalog. The Gloss Medium is chemically designed to increase flow and transparency while acting as a non-removable varnish. The Matte Medium contains a silica flattening agent to reduce sheen; a key technical note is that it is opaque when wet but dries translucent, making it excellent for extending volume without changing the color value significantly.Gel Medium: A heavy-body polymer designed to retain brushstrokes. It is technically formulated to have the same viscosity as Blick Artists' Acrylic Heavy Body paints, allowing for seamless mixing. It increases the transparency of the paint for glazing while holding moderate impasto peaks.Modeling Paste: This is a marble dust and polymer putty designed for building rigid structures. Unlike the flexible Gel Medium, Modeling Paste dries to a hard, opaque white finish that can be sanded or carved. It is strictly for use on rigid supports (like wood panels) as it may crack on flexible canvas.2. Blick Studio® Mediums (The Education Standard)The Studio line is chemically formulated for the classroom and high-volume environments. While still archival, these mediums often use a slightly lower solid content than the Artists' line.Blickrylic® Gel Medium: Originally designed for the "Blickrylic" school paint line, this is a soft gel often used as a classroom adhesive for collage. It has excellent tack but a softer film than professional gels, making it ideal for paper projects but less suitable for heavy sculptural impasto.Flow Improver: A surfactant additive (similar to Liquitex Flow Aid) that breaks water tension. It is technically essential for students using budget-grade brushes, as it helps the paint flow smoothly without the need for excessive water that could break the binder.3. The "White Label" AdvantageThe primary technical feature of the Blick brand is its chemical similarity to top-tier brands at a fraction of the cost.Intermixability: Blick mediums are chemically neutral acrylic polymers, meaning they are fully compatible with Golden, Liquitex, and other acrylic paints. Artists often use Blick Gloss Medium to extend expensive Golden Quinacridones, saving money on the "bulk" of the mixture while keeping the premium pigment.Archival Stability: Despite the lower price, independent testing often rates Blick Artists' mediums as highly lightfast and non-yellowing, comparable to more expensive brands. The main trade-off is often a slight difference in odor (ammonia levels) or extreme-edge performance (e.g., leveling capability).Technical SummaryThe Blick medium catalog is a utilitarian collection characterized by economic efficiency and reliable baselines. From the rigid structure of the Artists' Modeling Paste to the bulk utility of the Blickrylic Gel, these tools are optimized for artists who need "standard" acrylic performance—glazing, extending, and texturing—without paying for the specialized chemical patents of some other brands. They are the industry's "control group," offering exactly what is expected of an acrylic medium with no experimental surprises.

Daler-Rowney, based in Bracknell, UK, is distinguished by its cross-discipline engineering. While most manufacturers view acrylics purely as "paint," Daler-Rowney views acrylics as a base system for printing. Their catalog is defined by the System 3 mediums, which allow standard tube acrylics to be converted into professional-grade screen printing and block printing inks. They effectively bridge the gap between the painting studio and the print shop.1. System 3® Screen Printing Medium (The Industry Standard)This is the brand’s most famous technical achievement. It allows artists to use standard System 3 acrylic paint for screen printing without the need for toxic oil-based plastisol inks.Retarder Chemistry: Screen printing with acrylics is usually difficult because the paint dries in the mesh, ruining the screen. This medium acts as a heavy-duty retarder that keeps the acrylic wet on the mesh for extended periods but dries permanent on the paper.Thixotropic Flow: It alters the rheology of the paint to be "short" (less stringy), ensuring crisp edges on the print without bleeding under the stencil.Solvent-Free: By using this medium, studios can clean their screens with water instead of harsh solvents, making it the standard for educational institutions.2. System 3® Textile Printing Medium (The Fabric Converter)This medium converts System 3 acrylics into washable fabric paint.Heat-Set Polymer: When mixed with acrylic (1:1 ratio), it creates a polymer bond that can be heat-set with a household iron. Once set, the acrylic becomes wash-fast and flexible, preventing the stiffness usually associated with painting on clothes.Fiber Penetration: It lowers the viscosity of the paint to ensure it penetrates the fiber weave rather than sitting on top as a crust.3. FW™ Pouring Medium (The Ink Specialist)While many brands have pouring mediums, Daler-Rowney’s is specifically engineered for their FW Acrylic Inks.Ink Compatibility: Most pouring mediums are designed for heavy body tubes. This version is thinner and optimized for the extremely low viscosity of acrylic ink. It allows for "galaxy" and "cloud" effects that are difficult to achieve with heavier paints.Self-Leveling Glass: It dries to an extremely hard, glass-like finish that mimics resin. It is often used to coat mixed-media pieces to give them a high-gloss, unified surface.4. Adigraf® Block Printing Medium (The Relief System)This is a unique crossover product that allows acrylics to act like linocut ink.Tack Management: Standard acrylics are too slippery for rollers (brayers). This medium adds "tack" or stickiness to the paint, allowing the roller to pick up an even film and transfer it to the lino block without skidding.Drying Delay: Like the screen medium, it keeps the acrylic open long enough to roll out a block and print it without drying on the plate.5. System 3® Soluble Matt Varnish (The Removable Protection)Daler-Rowney is one of the few student-grade brands to offer a removable water-based varnish.Reversibility: Unlike standard polymer varnishes which are permanent, this varnish is formulated to be removed with household ammonia or specific alkaline strippers. This provides a layer of archival protection that can be cleaned or replaced if it gets dirty, a feature usually reserved for expensive professional lines.Technical SummaryThe Daler-Rowney medium catalog is a printmaker’s collection characterized by utility. They are the only major brand that focuses so heavily on converting acrylic paint into ink—whether for screens, fabric, or lino blocks. From the classroom safety of the Screen Printing Medium to the resin-like finish of the FW Pouring Medium, these tools are optimized for artists who want to take their acrylics off the canvas and onto apparel, paper, and mixed surfaces.

Golden Artist Colors, based in New York, is widely regarded as a scientific leader in acrylic technology. Unlike brands that focus on tradition, Golden focuses on the chemical customization of the acrylic polymer. Their catalog is defined by the GAC (Golden Artist Colors) specialty polymers—the raw industrial emulsions that allow artists to engineer their own paint properties—and their OPEN system, which fundamentally changes the evaporation rate of acrylics to mimic oil paint.1. GAC™ Specialty Polymers (The Custom System)The GAC series consists of the raw acrylic polymers used to manufacture the paints. By selling these pure emulsions to artists, Golden allows for "custom engineering" of the paint film.GAC 100 (Universal/Sealer): This is the most flexible and universal polymer in the line. Its primary technical use is as a sealer to prevent "Support Induced Discoloration" (SID), where impurities from wood panels leech into the paint layer and cause yellowing. It is also used to dilute heavy body acrylics without losing film integrity.GAC 800 (Pouring Specialist): Designed specifically to prevent "crazing" (cracking) in drying puddles. When standard acrylics are poured thickly, the surface dries faster than the core, causing crevices. GAC 800 is engineered to dry with a uniform tension, making it the industry standard for "puddle" and pouring techniques.GAC 900 (Fabric & Heat-Set): This polymer is designed to turn standard acrylics into fabric paint. It remains soft and pliable after laundering. It requires heat-setting (ironing) to cross-link the polymer to the fibers of the clothing.GAC 200 (Hard/Adhesion): The hardest polymer in the catalog. It is used to increase film hardness and adhesion to non-porous surfaces like glass or metal. Because it is so hard, it is not recommended for flexible canvas, as it may crack.2. Gel Mediums (Viscosity & Texture)Golden offers the widest range of viscosity profiles in the industry, graded by a logical system of "Soft" to "Extra Heavy."Soft Gel: This medium is thinner than Heavy Body paint but thicker than Fluid. It is primarily used as a glue for collage and paper lamination because it has excellent wetting properties and dries clear.Regular Gel: Matches the viscosity of Golden Heavy Body Acrylics perfectly. It is used to extend the paint volume without changing the "feel" of the stroke. It is the standard choice for impasto work where cost-saving is required.Heavy & Extra Heavy Gel: These are significantly thicker than the paint itself. They are used to build high peaks and sculptural structures. The "High Solid" versions contain less water, ensuring less shrinkage during the drying process.3. High Flow Medium (Airbrush & Inking)This fluid medium is designed to work with the High Flow Acrylic line or to thin heavier paints for spraying.Ink-Like Consistency: Unlike water, which breaks down the acrylic binder if used in excess, this medium thins the paint to the consistency of ink while maintaining a strong film. It allows acrylics to be used in refillable markers, dip pens, and airbrushes without clogging.Hard Film: It dries to a relatively hard finish, which helps prevent the tackiness often associated with softer fluid mediums.4. OPEN™ Acrylic Mediums (Slow-Drying)Golden OPEN is a revolutionary system that relaxes the polymer chains to slow down evaporation, allowing acrylics to stay wet for hours rather than minutes.OPEN Medium: This is the standard vehicle for the OPEN system. When mixed with OPEN Acrylics, it extends the wet time even further and increases transparency for glazing. It allows for traditional "blending" techniques that are usually impossible with fast-drying acrylics.OPEN Thinner: Unlike water, which evaporates quickly, this thinner is a proprietary fluid that re-wets the paint on the palette. It is technically a "reopening" agent that can revive paint that has become tacky, keeping the palette workable for long sessions.5. Acrylic Glazing Liquid (The Blending Fluid)Formerly known as "Acrylic Glazing Medium," this is a slow-drying polymer fluid designed to mimic the behavior of oil glazes.Extended Working Time: It stays wet for 30–45 minutes, allowing for smooth transitions and soft edges. It is often used for portraiture where subtle skin tone shifts are required.Brushability: It offers a "slippery" feel that prevents the brush from dragging, enabling long, continuous strokes similar to using linseed oil.Technical SummaryThe Golden medium catalog is a laboratory-grade collection characterized by the GAC raw polymer system and the OPEN slow-drying technology. From the pouring capabilities of GAC 800 to the heat-set textile engineering of GAC 900, these tools are optimized for artists who want to deconstruct the chemistry of their paint to achieve specific physical properties. They treat acrylic not just as "plastic paint," but as a tunable system.

Liquitex is historically significant as the company that created the first water-based acrylic artist paint in 1955. Their medium catalog is distinguished by its textural variety. Liquitex focuses on "ready-to-use" effects, offering the widest range of pre-mixed texture gels and the industry-standard Pouring Medium that launched the fluid art movement.1. Pouring Medium (The Fluid Art Standard)Liquitex Pouring Medium is the specific formulation that popularized "dirty pours" and acrylic skins. It is technically engineered to break the surface tension of the paint while maintaining high film integrity.Self-Leveling Suspension: The medium is formulated to be extremely fluid but high in resin solids. This allows it to suspend heavy pigments evenly without them sinking to the bottom, creating a perfectly flat, seamless "glassy" surface when dry.Anti-Crazing Chemistry: A major technical failure in fluid art is "crazing" (cracking) when thick puddles dry unevenly. This medium is engineered with flexible plasticizers that ensure the surface dries at the same rate as the core, preventing fissures even in thick applications.High Gloss Refraction: It dries to a high-gloss, wet-look finish that enhances the refractive index of the colors, making acrylics look similar to resin art without the toxicity of epoxy.2. Super Heavy Gels (The Structural Builders)Liquitex offers a "viscosity ladder" of gel mediums, culminating in the Super Heavy Gel, which is significantly stiffer than the paint itself.Structural Memory: This gel is thixotropic and dense. It is designed to hold high peaks and crisp palette knife edges without slumping as it dries. It effectively turns standard soft-body acrylics into sculptural clay-like paste.Adhesion Power: Because of its high resin content, it acts as an industrial-strength glue. It is the standard medium for heavy collage work, capable of bonding wood, sand, and heavy objects to the canvas.3. Specialty Texture Gels (The Effects Library)Liquitex is unique for its extensive library of pre-mixed "Effects Mediums" that contain granular solids suspended in clear acrylic resin.Glass Beads: Contains clear, spherical glass beads that reflect light. When mixed with transparent colors, it creates a "bubbly" or effervescent texture that glows from within.Black Lava: A clear gel speckled with black, hexagonal particles. It is used to create grimy, asphalt-like textures or to darken colors while adding physical grit.String Gel: A specialized, honey-like medium that pours in long, continuous strands. It allows artists to "drizzle" acrylic paint like syrup, creating organic, calligraphic lines that sit on top of the surface.4. Flow Aid™ (The Surface Tension Breaker)Unlike a medium, Flow Aid is an additive (it contains no binder) and must be used sparingly.Surfactant Chemistry: It is a concentrated surfactant that drastically reduces the surface tension of the water in the paint. This allows the paint to soak into raw canvas (staining) rather than sitting on top, mimicking the effect of watercolor.Absorbency Control: It is technically essential for airbrushing or hard-edge painting, as it eliminates brush strokes and improves the flow of the paint out of the gun or off the brush without thinning the color intensity as much as water would.5. Soluvar™ Varnish (The Removable Protection)Soluvar is a technical standout in the acrylic world because it is a removable final varnish.Solvent-Based Reversibility: Most acrylic varnishes are permanent; once applied, they bond to the paint forever. Soluvar is solvent-based (using mineral spirits), meaning it sits on top of the acrylic layer without bonding to it. It can be removed years later with solvent to clean the painting, following conservation standards usually reserved for oil painting.Technical SummaryThe Liquitex medium catalog is a broad-spectrum collection characterized by the Pouring Medium phenomenon and a focus on structural texture. From the high-gloss self-leveling of their fluid mediums to the granular reality of their Glass Beads and Lava gels, these tools are optimized for artists who want to radically alter the physical presence of their paint. They provide "off-the-shelf" solutions for complex chemical textures.

Old Holland, the world's oldest paint manufacturer (est. 1664), is distinguished in the acrylic market by its "oil-like" philosophy. While most brands accept that acrylics feel like plastic, Old Holland engineered their New Masters line to replicate the look, feel, and satin gloss of their legendary oil paints. Their medium catalog is defined by a proprietary binding system that claims 100% acrylic purity with minimal wet-to-dry color shift, and a strict warning that their unique chemistry is best kept within the brand family.1. Acrylic Mediums (The Fluid Controllers)These are the standard fluid vehicles for the line, designed to reduce viscosity without compromising the paint film.Gloss, Satin, & Matt Mediums: Unlike student-grade mediums that use white milky fillers to create a matte finish, Old Holland’s mediums are formulated to be as clear as possible. They are thixotropic (becoming more fluid when shaken or brushed) and contain no thickeners.Technical Note: The Matt Medium uses a unique matting agent that mimics the natural, lower-sheen cure of oil paint rather than the chalky flatness often seen in acrylics.2. Gel Mediums (The Viscosity Ladder)Old Holland offers a precise "ladder" of gels designed to match or exceed the stiffness of the tube color.Soft Gel: Lighter than the paint, used for fluid glazes that still need some body.Standard Gel: Chemically engineered to match the exact viscosity of New Masters tube paint. This allows artists to extend their expensive pigments without changing the "feel" of the brushstroke—a critical feature for professional painters.Extra Heavy & High Build Gels: These are the structural heavyweights. The High Build Gel is semi-opaque and dense, effectively serving the role of a modeling paste but with the flexibility of a gel. It allows for massive impasto ridges that do not shrink or crack as they dry.3. Pearl Tinting Gel (The Optical Modifier)Old Holland includes a specialty gel designed to bring their "New Masters" concept into the modern era.Universal Shimmer: This is a gel medium loaded with iridescent mica particles. Unlike pre-mixed metallic paints, this gel allows you to turn any color in the 168-color range into a pearlescent version.Ratio Control: It is technically optimized for an 80/20 mix (80% gel to 20% paint) to maintain maximum shimmer without losing the color identity.4. UV Resistant Varnishes (The Solvent-Based Finish)A major technical standout is Old Holland's approach to varnishing acrylics.Removable Cyclohexanol Base: Unlike most acrylic varnishes which are permanent water-based polymers, Old Holland produces a solvent-based acrylic varnish (using cyclohexanol/white spirits). This makes the varnish layer removable and chemically distinct from the paint layer underneath, adhering to strict conservation standards usually reserved for oil painting.Archival Protection: Because it is solvent-based, it provides a harder, more non-porous shield against dirt and UV light than standard polymer varnishes.5. Retarder Gel (The Open Time Extender)Old Holland’s solution for the fast-drying nature of acrylics is a gel, not a fluid.Viscosity Preservation: Because it is a gel, adding it to the paint extends the working time without turning the paint into a watery soup. This allows for "wet-in-wet" blending techniques that retain the physical brush marks.Limit Warning: As with most retarders, it is an additive. The technical recommendation is to add no more than 10% to the mixture to prevent the paint from remaining permanently tacky or sensitive to water.Technical SummaryThe Old Holland New Masters medium catalog is a boutique collection characterized by oil mimicry. They reject the "plastic" feel of standard acrylics, using a proprietary binding system to create mediums that feel like traditional oils. From the Standard Gel that perfectly matches their tube viscosity to the solvent-based varnish that offers museum-grade removability, these tools are optimized for oil painters transitioning from oils to acrylics who demand the same tactile experience.

Pébéo, the French manufacturer based in Provence, is distinguished by its focus on "reactive" chemistry. While brands like Golden and Liquitex focus on traditional acrylic purity, Pébéo engineers solvent-based paints that chemically interact with each other to create organic, cellular textures. Their catalog is defined by the "Fantasy" line (Prisme and Moon) and their "thermo-hardening" glass and ceramic paints, which allow for permanent dishwasher-safe finishes using a standard home oven.1. Fantasy Prisme® (The Honeycomb Reactor)Fantasy Prisme is a solvent-based alkyd paint engineered to self-manipulate as it dries. It is the industry standard for creating "cellular" art without the need for pouring mediums or silicone oil.Self-Retracting Chemistry: The paint contains a specialized incompatibility between the pigment and the binder. As the solvent evaporates, the pigment pulls away from itself, naturally forming distinct "honeycomb" or cellular shapes.Wet-in-Wet Reactivity: When dropped into wet Vitrail glass paint or Fantasy Moon, it aggressively pushes the other pigments aside, creating complex, biological-looking webs. It is widely used in jewelry making (poured into bezels) because it levels perfectly into a smooth, enamel-like surface.Opaque and Metallic: Unlike standard glazes, Prisme colors are highly opaque and often metallic, designed to cover metal or dark backgrounds completely.2. Fantasy Moon® (The Hammered Effect)Fantasy Moon is the sister product to Prisme, designed to create a "hammered metal" or marbled texture rather than cells.Pearlescent Turbulence: The chemistry of Moon relies on metallic particles that circulate within the alkyd resin as it cures. This creates a textured, "moonscape" visual effect that mimics traditional hammered copper or pewter.High-Gloss Finish: It dries to a hard, vitreous (glass-like) finish. It is often used as a faux-enamel on wood, glass, or ceramic, giving the appearance of fired glaze without the need for a kiln.3. Vitrail™ & Cerne Relief (The Stained Glass System)Vitrail is a transparent, solvent-based paint originally designed for glass but now a staple of mixed media on canvas.Solvent Transparency: unlike water-based glass paints, Vitrail uses strong solvents to keep the resin crystal clear. It has excellent leveling properties and is often used by painters to create liquid pools of transparent color that sit separately from opaque acrylic layers.Cerne Relief (Dimensional Outliner): This is a thick, paste-like paint supplied in a tube with a fine nozzle. It is technically designed to act as a barrier (cloisonné), holding liquid Vitrail or Fantasy paints inside a shape so they do not bleed into one another. It dries to a hard, raised ridge that mimics the lead caming of stained glass.4. Gédéo® Resins (The Crystal Coat)Pébéo’s Gédéo line brings industrial epoxy resin technology to the fine art market.Crystal Resin: A two-part epoxy system that mimics liquid glass. It is engineered to be non-yellowing and bubble-free. Artists use it as a final varnish for mixed media pieces, pouring it over the canvas to encase textures (like the Prisme honeycomb) in a lens-like layer that enhances color saturation.Glazing Resin: A semi-liquid resin that stops at the edges of a substrate due to surface tension. This allows artists to add a domed, glassy finish to a specific area of a painting without the resin dripping off the sides.5. Porcelaine 150 & Vitrea 160 (The Thermo-Hardening Series)These lines are technical standouts for being the first water-based paints that become permanent and dishwasher-safe after baking in a standard home oven.Molecular Cross-Linking: The paint remains water-soluble while wet. However, when heated to 150°C (Porcelaine) or 160°C (Vitrea) for a specific time, the polymers cross-link and fuse to the non-porous surface. This creates a finish that resists solvents and detergents.Porcelaine 150: An opaque enamel designed for ceramic and earthenware. It mimics the look of low-fire glaze.Vitrea 160: A transparent dye-based paint designed for glass and crystal. It mimics the look of colored glass rather than paint sitting on top of glass.Technical SummaryThe Pébéo catalog is a specialized collection characterized by chemical reactivity and faux-enamel finishes. From the self-patterning cells of Fantasy Prisme to the bake-hardened durability of Porcelaine 150, these products are optimized for artists who want the look of industrial materials (glass, metal, enamel) using accessible, brush-on chemistry. They focus on the interaction between incompatible liquids to generate texture automatically.

Utrecht Art Supplies, founded in 1949 in Brooklyn, New York, is distinguished by its mill-direct heritage. Unlike many store brands that simply re-label generic products, Utrecht maintains its own distinct formulations (even after its acquisition by Blick), focusing on high-pigment load and heavy-body compatibility. Their medium catalog is defined by the Professional Gesso—widely considered the best value-for-opacity ground in the industry—and their Modeling Paste Extender, which is engineered to bulk up paint volume without sacrificing color intensity.1. Artists’ Acrylic Gesso (The Brooklyn Standard)Utrecht’s gesso is legendary among professional painters for being significantly thicker and more opaque than competitors at the same price point.High-Viscosity Formula: The professional grade is engineered with a higher concentration of titanium dioxide and calcium carbonate solids than standard student gesso. This creates a heavy, creamy ground that covers canvas in one coat where others might take two or three, effectively sealing the surface with a flexible, non-cracking film.Tooth Profile: It dries to a classic medium tooth finish. This provides a physical grip that is aggressive enough for heavy body acrylics and oils but smooth enough for detailed portraiture, striking a technical balance that minimizes the need for sanding.Oil Compatibility: While it is an acrylic polymer, it is chemically formulated to be the ideal archival ground for oil paints. It prevents the oil from penetrating the canvas fibers (which causes rotting) while providing a lean surface that encourages proper adhesion of the first oil layer.2. Acrylic Gel Mediums (The Heavy Body Match)Utrecht’s gel mediums are formulated to match the exact viscosity and rheology of their Artists’ Acrylic paint line.Gloss Gel: A crystal-clear, heavy-body polymer. Its primary technical function is to extend the paint volume without changing its feel. Because it matches the stiffness of the paint, artists can mix it 50/50 with color to double their paint supply for impasto work without the mixture becoming "soupy" or leveling out unexpectedly.Matte Gel: This medium contains a silicate matting agent to kill the natural gloss of the acrylic resin. It is technically opaque when wet but dries to a translucent satin finish. It is often used as a collage adhesive because the matte surface becomes invisible once dry, unlike glossy gels that leave shiny spots.3. Modeling Paste & Extender (The Dual-Purpose Builder)While most brands sell "Modeling Paste" strictly for texture, Utrecht markets theirs as a "Paste & Extender," highlighting its chemical stability when mixed with color.Marble Dust Aggregate: It is made with precipitated calcium carbonate (marble dust) and pure acrylic polymer. This creates a extremely dense, heavy putty that holds sharp palette knife peaks without shrinking.Extender Capability: Unlike standard pastes which turn colors pastel white, this formula is engineered to accept color well. It acts as a "bulking agent," allowing muralists and large-scale painters to mix it with expensive pigments to cover massive areas with thick texture at a fraction of the cost of pure paint.4. Specialty Effect MediumsUtrecht offers a focused range of optical modifiers designed to change the way light interacts with the paint surface.Iridescent Tint: A polymer medium loaded with mica particles. It is technically designed to be mixed with transparent colors to create custom metallic paints. When mixed with Phthalo Blue or Quinacridone Magenta, it creates interference colors that shift visually depending on the viewing angle.Illuminating Medium: This is a distinct variation that uses a finer, more subtle reflective particle than the Iridescent Tint. It is designed to add an inner glow to glazes without the obvious sparkly texture of mica, making it useful for capturing the effect of sunlight on water or atmospheric haze.Technical SummaryThe Utrecht medium catalog is a "working artist's" collection characterized by opacity and structural density. From the one-coat coverage of their Professional Gesso to the cost-saving utility of their Modeling Paste Extender, these tools are optimized for artists who need to cover large surfaces and build heavy textures without the premium markup of boutique brands. They represent the industrial efficiency of the original Brooklyn factory, prioritizing coverage and bulk over experimental effects.

Winsor & Newton divides its acrylic medium ecosystem into two distinct technical tiers: the Professional range (formerly "Artists' Acrylic") and the Galeria range (Student/Academic).The Technical Split: The Professional line is engineered with a proprietary clear binder that eliminates the "color shift" (darkening) common in acrylics, making it the choice for precise color matching. The Galeria line uses a standard acrylic emulsion (milky wet, clear dry) and is engineered for volume and texture, offering a much wider variety of particulate gels (sand, beads, lava) than the professional line.Tier 1: Professional Acrylic MediumsThe "No Color Shift" SystemThis tier is designed for archival permanence and optical precision. The key innovation here is that the binder is transparent even when wet, allowing you to see the final color immediately.1. Fluid & Glazing MediumsGlazing Medium: The flagship fluid. It creates a self-leveling, oil-like film for maximum transparency. Because it lacks the milky white tint of standard mediums, it is the industry standard for creating dark, rich glazes without cloudiness.Slow Drying Medium: An additive that extends working time by roughly 30 minutes. It creates a chemical environment that retards water evaporation, allowing for wet-in-wet blending closer to oils. Note: Limit addition to 1:1 ratio to prevent tackiness.Flow Improver: A tension-breaking surfactant (not a binder). It is used to stain raw canvas or create flat, brushless washes. It must be diluted with water (1:20 ratio) before use.2. Gels & PastesGloss & Matt Gel: These maintain the "no color shift" promise while extending the body of the paint. They are formulated to match the high viscosity of the Professional tube colors perfectly.Professional Modeling Paste: A lightweight sculptural paste. Unlike standard heavy pastes, this is formulated with microscopic air bubbles or lightweight solids to prevent it from weighing down the canvas or sagging on large vertical applications. It dries to a flexible, matte white finish.Tier 2: Galeria Acrylic MediumsThe Texture & Volume SystemWhile often labeled "student grade," the Galeria medium line is chemically robust and widely used by professionals for underpainting, texturing, and large-scale mural work due to its cost efficiency and variety.1. The "Structure" Gels (Texture Series)Galeria offers the brand's primary library of "particulate" gels, which are largely absent from the Professional line.Structure Gel: A standard heavy-body gel used to thicken Galeria paints (which are naturally softer) for impasto work.Heavy Structure Gel: A stiffer version designed to hold high, sharp peaks.Glass Beads Texture Gel: Suspends clear, spherical beads in acrylic. When mixed with transparent color, it creates a reflective, "bubbly" surface that catches light.Black Lava Texture Gel: Contains fine, black grit. It creates a speckled, asphalt-like texture. It is often used as a ground for pastels or to darken colors while adding tooth.Sand Texture Gel: Contains refined silica sand for a gritty, fine-tooth surface similar to sandpaper.Large Grain Gel: A coarser version of the sand gel, used for rough, cement-like textures.2. Modeling Pastes (Heavy Duty)Flexible Modelling Paste: A standard paste that remains pliable after drying, preventing cracking on flexible surfaces like canvas.Heavy Carvable Modelling Paste: This is distinct from the Professional version. It dries significantly harder and is designed to be subtractive—you can carve, sand, or drill it once dry. It is best used on rigid supports (wood panels) rather than canvas.3. Functional FluidsGaleria Fluid Retarder: A gel-based retarder (unlike the liquid professional version) that slows drying time.Galeria Flow Improver: Similar to the professional version but often sold in larger bottles for high-volume classroom use.Iridescent Medium: A pearlescent additive that adds shimmer to any color. It is exclusive to the Galeria line but compatible with Professional paints.Textile/Screen Printing Medium: A specialty fluid that turns acrylic paint into screen ink, slowing the drying time significantly to prevent clogging the mesh and ensuring the paint remains soft on fabric.Tier 3: Varnishes & CleanersShared CompatibilityWinsor & Newton produces varnishes that are technically compatible with both lines, though they are often branded separately.Professional UV Varnishes (Gloss/Matt/Satin): These are reversible, solvent-based varnishes (removable with white spirits) that offer the highest level of UV protection for gallery works.Galeria Varnishes (Gloss/Matt/Satin): These are typically water-based polymer varnishes. They are permanent (non-removable) and act as a final protective "skin" rather than a conservation-grade layer.Artguard Barrier Cream: A unique skin-protection product in their catalog, designed to coat hands before painting to make scrubbing acrylics off skin easier and safer.Technical SummaryChoose Professional when you need optical precision (what you see wet is what you get dry) and archival reversibility (solvent-based varnishes).Choose Galeria when you need physical texture (sand, beads, carving) or volume (large-scale structure gels) at a lower cost.