Method of preparing a scoured animal hair material

A method for preparing a scoured animal hair material in which the animal hair retains therein 1 to 3% by weight of a residual soapy substance and 0.3 to 5.0% by weight of a residual fatty substance, which method comprises opening a greasy animal hair material to cause it to be in the form of opened loose fibers having a density of from 0.007 to 0.04 g/cm.sup.3, and;

• scouring said opened loose fibers with a scouring liquid comprising at least one organic solvent selected from the group consisting of 1,1,1-trichloroethane and methylene chloride, and 0.1 to 10%, based on the entire weight of said scouring liquid, of a raw animal hair grease which has been extracted from the same type of greasy animal hair as that to be scoured, while moving either one or both of said animal hair material and said scouring liquid in relation to each other at a relative speed of from 3 to 60 m/min.