This set contains the entire range of 45 Cotman Watercolours, plus and extra 5 of the most popular colours. It comes in a compact plastic case with space to mix paint in the lid as well as an extra detachable mixing tray. The Cotman range of watercolours is a high quality selection of colour at more affordable prices for beginners and students. It is priced uniformly across the range due to there being a reduced choice of colours compared to the Artists’ Watercolour range. This is achieved by substitution, where possible, of the very expensive natural pigments. The modern pigments used instead are matched as closely as possible to the traditional colour, but may have alternative handling qualities, such as granulation and blending, to the traditional pigment. They do, however, have the same superior strength and quality, and may even provide more desirable results where an even paint film is preferred.