Watercolour mediums can help you control how watercolour paint behaves - its texture, how it flows, how it lifts from the paper, and how fast it dries.
Jackson's : Artist Watercolour Paint
Your Comprehensive Guide To Watercolour Mediums - Jackson's Art Blog
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Introducing Jackson's Paper Guide - Jackson's Art Blog
Colour Mixing Guide: Watercolour Book By Julie Collins
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Frances Featherstone Experiments with Jackson's Oil Painting
A Guide to Watercolour Painting - Jackson's Art Blog
A Guide to Watercolour Painting - Jackson's Art Blog