The FM Hue Test includes a total of ninety-three colors mounted in plastic caps, housed in four separate cases. Each case consists of two hinged panels which contain a quarter of the eighty-five numbered, removable color caps. (Two caps are repeated and fixed as pilot colors at either end of one panel in each case, making a total of ninety-three caps.)
Pigments in the color caps are made from the most stable materials available. However since no chemical is absolutely permanent, the caps should not be unduly exposed to light.
The matt surface of the color caps is necessary in order to give the same spectral characteristics from any angle, but it is sensitive to fingerprints. It has been found that slight soiling has no effect upon the diagnostic value of the test; however, if the caps become severely smudged or damaged, they should be replaced. With normal usage, it is recommended that the caps be replaced every two to four years.
A Windows software package for scoring the FM 100 Hue Test is also included. This program is designed to simplify scoring of the test and provides a powerful set of tools for plotting, analyzing and storing results.