Method of measuring fines in pulp

G - Physics – 01 – N

Patent

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73/55

G01N 21/27 (2006.01) G01N 21/53 (2006.01) G01N 33/34 (2006.01)

Patent

CA 1168893

ABSTRACT OF THE DISCLOSURE Methods Or measuring the crill content of pulp suspensions are disclosed. The methods include passing a first light radiation, preferably ultraviolet light, having a wavelength comparable to the particle diameter of the crill, through the pulp suspension, passing a second light radiation having a wavelength longer than the first wave- length but shorter than the mean pulp diameter through the pulp suspension, collecting both light radiations after they have transilluminated the pulp suspension, and measuring absorbencies for both of these collected light radiations so that the crill content can be determined therefrom.

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