Colour speck counter for assessing the dirt level in secondary fibre pulps

Verikas, Antanas, 1951- (author): Högskolan i Halmstad,Intelligenta system (IS-lab)

Malmqvist, Kerstin, 1939-2021 (author): Högskolan i Halmstad,Intelligenta system (IS-lab)

Bergman, Lars, 1956- (author): Högskolan i Halmstad,Intelligenta system (IS-lab)

Engstrand, P. (author): Center of Excellence, Holmen Paper AB, Norrkoping, Sweden

(creator_code:org_t)

Montreal : Pulp and Paper Technical Association of Canada, 2003
2003
English.
In: Journal of Pulp and Paper Science (JPPS). - Montreal : Pulp and Paper Technical Association of Canada. - 0826-6220. ; 29:7, s. 220-224

Abstract Subject headings

Speck count is increasingly used as a parameter to assess the quality of secondary fibre pulps. The resolution of most of the commercial image analysis systems is too low for detecting small specks. Therefore, small specks are not taken into consideration when using conventional image analysis systems to assess pulp quality. We have recently developed a colour speck counter which can detect specks ranging in size from ∼5 to 300 μm. In this paper, we present the results of experimental investigations related to the use of the speck counter to assess the dirt level in secondary fibre pulps. We assume an exponential speck size distribution and advocate the idea of using the scale parameter λ of the distribution to characterize the size content of a set of specks detected. Experimental investigations performed have shown that the scale parameter, together with the expected speck area and the speck number, can be used to characterize and rank secondary fibre pulps according to dirt level and the dirt-size distribution.

By the author/editor: Verikas, Antanas ...; Malmqvist, Kerst ...; Bergman, Lars, 1 ...; Engstrand, P.

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Paper Pulp and F ...

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