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Golden GAC Special Purpose Mediums
Golden GAC Special Purpose Mediums
Golden GAC Special Purpose Mediums
Golden GAC Special Purpose Mediums
Golden GAC Special Purpose Mediums
Golden GAC Special Purpose Mediums
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Golden GAC Special Purpose Mediums

Regular price
£17.50
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£17.50
Regular price
£17.95
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GAC (short for Golden Artist Colors) Speciality Acrylic Polymers are based on 100% acrylic polymer emulsions. The GACs are useful as mediums or modifiers of acrylic paints and can be used to extend acrylic colours, to regulate transparency, create glazes, increase gloss, reduce viscosity or improve adhesion and film integrity. GAC polymers can also be used for binding pigment solids for various effects and surfaces. Unlike the other GOLDEN Mediums and Gels, GAC Acrylic Polymers have only a minimum amount of thickeners, levellers, defoamers and surfactants to ensure good film formation.

The consistency of the GAC polymers is more fluid and thin than other Golden Mediums, so they will reduce the thickness of most Golden Acrylic Paints. Golden Fluid Acrylics are slightly thicker than the GACs, but will exhibit less change in viscosity with the addition of a GAC polymer.

Each GAC is a unique polymer with unique benefits and applications. Refer to the product descriptions below to find the proper medium for a particular applications. 

GAC 100 is a thin, translucent, gloss medium. Useful for thinning or extending colors as well as increasing flexibility. Wets out solids more readily than other polymers and is useful for creating homemade paints. GAC 100 provides basic protection from Support Induced Discoloration (SID), for better protection use Golden Gloss Medium.

GAC 200  Hard acrylic extender for non-porous surfaces is the hardest and least flexible polymer we offer. It is Ideal for mixing with acrylic colours to increase film hardness, reduce dry film tack and to increase adhesion to many non-porous surfaces. Dries to a clear, high gloss, finish. GAC 200 is not recommended for flexible supports.

GAC 400  Stiffens natural fibres and fabrics and is useful for stiffening un-primed canvas or sculpting and shaping fabric. Fibres saturated with GAC 400 will dry to a hard, stiff film.

GAC 500  Gloss extender for Fluid Acrylic Colours is a unique balance of film hardness and flexibility offering increased levelling, increased mar resistance and decreased dry film tack. GAC 500 is particularly useful for extending Fluid Acrylic Colours with minimal property change. It can be mixed with Airbrush Transparent Extender for a fast-drying, sprayable isolation coat.

GAC 800  is a low-crazing extender for pouring acrylic colours. "Crazing" is the formation crevices in surfaces that develop as acrylic paints and mediums dry. The addition of GAC 800 promotes drying with a smooth, even film, good gloss and flexibility, but with moderate clarity. GAC 800 is also useful for adhesion to chalky surfaces.

GAC 900  Heat-set fabric painting medium, offers a very soft hand and laundering stability. Mix with High Flow Acrylics to produce "tie-dye" effects, or blend with Golden Heavy Body, Matte or Fluid Acrylics for brush or screen application.

We currently only stock the 237ml bottles but 473ml, 946ml and 3.78L bottles are available to order. Please email info@stuartstevenson.co.uk or phone the shop on 020 7253 1693.