Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With testing – sampling or analyzing
Patent
1982-03-12
1985-04-30
Alvo, Steve
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With testing, sampling or analyzing
356335, 356411, 356418, 356442, 162254, G01N 1500, G01N 2100, G01N 2131
Patent
active
045142572
ABSTRACT:
Methods of 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 wavelength 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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Karlsson Hakan I.
Pettersson Jan G. T.
Alvo Steve
Svenska Traforskningsinstitutet
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