Editing Frisket (section)

==Watercolour==
In [[watercolor painting]], frisket, also sometimes called masking fluid, is a removable liquid masking fluid based on latex and ammonia, often available in various colours to make its presence more obvious, which is applied to the surface in order to mask off the areas that are not to be coloured by a given application of paint. Frisket is usually used when the unmasked areas are desired to be the same colour and a rapid wash is being applied, or for negative painting effects.

Watercolouring frisket is applied using a brush, allowed to dry, and then the watercolour paints are applied and also allowed to dry. Once the paper is completely dry, the frisket can be easily removed by gentle rubbing with a natural [[crepe rubber]] pickup, the same as those used for removal of rubber cement. The paper must be completely dry before removing the frisket as the friction can otherwise damage the paper if still damp.

A subsequent application of frisket can be applied to mask other areas—usually those with the intention of applying a different colour or to darken some areas whilst not affecting others—and removed with the natural rubber pickup. This process can be repeated several times without damaging artist-grade watercolour papers, so long as the paper is completely dry after each application of watercolours. Some lesser grades of paper, often used for practice and academic purposes, may be more prone to damage after repeated masking and painting cycles, however. Although watercolour frisket can be removed by rubbing with the fingers, doing so has the disadvantage of potentially transferring skin oils which can discolour the artwork, or otherwise affect subsequent applications of watercolours or other media such as chalk or ink.