The only book dedicated to this topic, this concise text introduces densitometers and the process of using densitometers effectively, in clear, non-technical language. The book explains how densitometers work, the difference between narrow-band and wide-band, what polarized filters do, how to select the best densitometer for an operation, how to use it properly, and how to conform to densitometric standards. It includes appendices on IDEAlliance's T-Ref, standard lighting, and statistical process control (SPC). 76 pages, softcover, 3rd revision