Abstract
Minolta has developed a new spectrophotometer CM-3630 for pulp and paper having several unique features. Specially its new technology for the adjustment of the relative UV content in the illumination, called NUVC (Numerical UV control), enables the instantaneous adjustment with no moving part, while a traditional Gaertner-Griesser method, in which a UV eliminating filter is mechanically inserted to the optimal position in the flux for the desired relative UV content, requires a time-consuming procedure. Beside this advantage, NUVC enables the UV adjustment not only for a single index such as ISO brightness or CIE Whiteness but also for both CIE Whiteness and Tint and even for Total Spectral Radiance Factor from which all colorimetric indices are derived.
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