Made from sable, goat or polyester. Resultant brushes are not as responsive as taper-dressed sables. Spring - the degree of resilience of the hair and its ability to return to a point. Sable displays excellent spring. Synthetic - polyester is used to make a variety of fibres for use as soft hair brushes and acrylic brushes.
Resultant brushes have wider bellies and finer points.
Wash - large flat soft hair brush, used primarily for flat washes in water colour.