A watercolour paper which has a hard, smooth surface. It is ideal for very detailed work but its drawback is that the paint has a tendency to run.
Compare with NOT and Rough papers.
A medium which is used with watercolours in order to bind the pigment. Extra gum arabic can be added to make the watercolor more transparent and glossy. It should be used sparingly in a diluted form to ensure it is not overused.
This is the division of a support along geometrical lines in order to produce the ‘perfect’ proportions.
The rule or thirds is a similar, but simpler method of obtaining an approximate result.