Watercolours basic colours that can be used to paint on all conventional watercolour surfaces. All 24 colours in the range have been formulated to give bright transparent colours and tinting strength. All the colours are intermixable giving endless colour possibilities . 25% Cotton , chlorine & acid Free. Ideal for all fine art techniques - wet and dry , internally and externally sized for ideal absorbance , Create your watercolor masterpiece: Great for solid colors or powdered pigment, use with watercolor crayons, markers and pencils to spread and smooth colors .