Application of an Electronic Counter to Determine Fiber Fineness Distribution in Wool Top

Abstract

The Coulter Counter, an electronic particle-sizing instrument, can appraise the average fineness and fineness distribution in wool tops with precision equivalent to that of the standard microscopic method. A time saving of 1/2 to 3/4 is realized over the microscopic method, with avoidance of subjective errors inherent in the latter. Oper ating conditions are described, along with methods of sampling, preparing a nonswelling but conductive solvent system, calibrating and checking the instrument, and minimizing error. Examples of results are presented with comparative microscopic data.