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Abstract
As graphic reproduction technology becomes more objective, and progresses from craft to engineering disciplines, the need for objective measurement also grows. This paper discusses instrumentation and its application in our industry -- both in the laboratory and on the production line. Some light will be shed on the question of Wideband versus Narrowband, as well as how to use colorimetric data in a context heretofore reserved for densitometry. The advantages of spectrophotometry are also discussed. The paper also discusses a laboratory application of spectrophotometry. Spectrophotometry is used to assess the precision of several models used to compute photometric halftone dot area. The Yule-Nielsen model was sufficiently precise, while other models experimentally tested were not.