Japan Holbein Watercolor Medium/Gum Arabic Medium/Masking Ink
Increases the granulation of color, giving a mottled appearance to colors which usually give a smooth wash, or enhancing the effect of granulating For
Winsor & Newton Watercolor Medium, Granulation Medium, 75ml (2.5-oz) bottle
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Paul Rubens Watercolor Mediums 60ml Glass Bottle Ox Gall Liquid Professional Watercolours Painting Tools for artist Art supplies
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Japan Holbein Watercolor Medium/Gum Arabic Medium/Masking Ink/Multi Sizing/Iridescent Medium/OX Gall Art Supplies - AliExpress
Japan Holbein Watercolor Medium/Gum Arabic Medium/Masking Ink
Winsor & Newton Iridescent Medium - 75ml – Opus Art Supplies
Winsor & Newton Watercolor Medium, Art Masking