In the last few years, many artificial licks have come available on the industry. These are very resilient and can be quite good, as well as affordable. Weak materials with no breeze, such as rabbit hair, are usually not used by oil performers. Styles of licks also are commonly different and used for different results. For example, a "round" is a indicated sweep used for details work. "Flat" licks are used to implement wide swaths of shade. "Bright" is a smooth with smaller sweep hair. "Filbert" is a smooth with curved sides. "Egbert" is a very long "Filbert" and is unusual. The specialist might also implement colour with a scheme knife, which is a smooth, steel knife.A scheme knife may also be used to eliminate colour from the fabric when necessary. A wide range of non-traditional resources, such as cloths, sponges, and pure cotton swabs, may be used. Some performers even colour with their fingertips.