Method and apparatus for the measurement of colour...

G - Physics – 01 – J

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G01J 3/46 (2006.01) G01N 33/32 (2006.01)

Patent

CA 1321897

PV 34434 ABSTRACT OF THE DISCLOSURE Measurement of a colour property of wet paint, such as lightness by calorimetry or photospectrometry, is carried out on a sample volume contained in a vessel and while the sample volume is subjected to shearing forces and advantageously also turbulence. The shearing and turbulence are created by a rotating disc having a spiral rib configuration on one surface which faces a window through which the measurements are made by a colorimeter or spectrophotometer.

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