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Watercolor Mediums


Watercolor Mediums change the working characteristics of paint, or of the surface that you are painting on. Use watercolor mediums to extend drying time, to increase brilliance and transparency, or to alter the absorption of the surface.

Watercolor Mediums by Brand
 
Adhesives, Binders, and Gum Arabic

Gum arabic, the binder used in traditional watercolors and gouache, is a natural gum derived from the acacia tree of sub-Saharan Africa. It is completely non-toxic as well as edible, and its major use is in the food and cosmetics industries.

It serves as an ideal binder for watercolors because it dissolves so easily in water, yet dries to form a thin layer that binds pigment to a paper surface. Add additional gum arabic to watercolors to increase their transparency and gloss, while extending drying time.

 
 
Granulation and Special Effects
 
Iridescent Mediums
 

Masking Fluids prevent the paper from absorbing color. Use a watercolor mask before you apply a wash to protect areas that you want to remain white. Peel away the mask when it is no longer needed.

Most masking fluids use natural latex or a synthetic compound with very similar characteristics. They may contain an artificial colorant so that you can easily identify the areas you have masked.

 
Priming and Surface Preparation
 
Textures and Aqua Pasto Effects
 
Wetting Agents and Oxgall

Wetting Agents are substances that reduce the surface tension of water. They help watercolor paints to spread and blend more easily, to penetrate the surface of the paper and its sizing. Watercolor paints contain wetting agents to increase working time and prevent them from drying out.

Oxgall, extracted from the gall bladders of oxen as a byproduct of meat production, is the the traditional wetting agent used by watercolor painters. Modern synthetic wetting agents are also available.

 

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