Entschlusseinheit mit Verwendung des Farbenvergleichs an Prüfstäbchen.

摘要

An apparatus is provided for making color comparisons between a test sample and a plurality of color samples (24). The color samples (24) are arranged on a circle on a rotatable member (2) and are successively moved into position adjacent a test sample. When an operator determines that a color sample (24) adjacent the test sample is closest in color to the test sample he operates a switch (53) which causes a stored numerical value associated with that sample to be read out and displayed on a display device (51).