A system for controlling the color of compounded polymer(s) comprises: a compounder for mixing the constituents of the compounded polymer(s) to produce a substantially homogeneous mixture; a sensor for measuring the color of the substantially homogeneous mixture at predetermined intervals; a colorant...http://www.google.com.au/patents/US5559173?utm_source=gb-gplus-sharePatent US5559173 - System for controlling the color of compounded polymer(s) using in-process color measurements
