Gouache Gouache: what it is and how it differs from watercolour Two water based techniques, two very different results. See how gouache differs from watercolour and which one suits the way you paint. Pigment What is really inside a tube of paint? Colour names can be misleading. See how pigment shapes the hue, transparency and behaviour of paint, and learn to choose more consciously. Brushes The brush matters Not every brush works in every technique. See how hair types and shapes differ, and how to pick a brush that makes the work easier.