Watercolour

Any paint that uses water as a solvent. Paintings done with this medium are known as watercolours. What carries the pigment in watercolour (called its medium, vehicle, or base) is gum arabic. An exception to this rule is water miscible oil paints, which employ water as their solvent, but are actually oil paints. Colours are usually applied and spread with brushes, but other tools can also used. The most common techniques for applying watercolour are called wet-on-dry and wet-on-wet, along with the dry brush techniques dry-on-dry and dry-on-wet. Colours can be removed while still wet, to various degrees by blotting. Most watercolour painting is done on paper, but other absorbent grounds can also be employed. The papers most favored by those who paint with watercolour is white, very thick, with high rag content, and has some tooth. (Artlex.com)

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