Papermaking furnish properties estimated by time-resolved spectroscopy

Arto Karppinen, Ari Kilpelä, Matti Karras, Jouni Tornberg, Risto Myllylä

Research output: Contribution to journalArticleScientificpeer-review


Papermaking furnish properties were studied in terms of the light scattering caused by fines and fibres. Scattering produces a retardation in the transit time of laser pulses from a device developed for time-of-flight range finding. The transit time delay in pulp with a consistency of 0.5-0.8 % was double or triple that in pure water and was proportional to fines content. the repeatability error of the measurement system was demonstrated to be less than 10 % of the retardation caused by the fines. Both chemical pulp and TMP containing wood fines or china clay were used in the tests.
Original languageEnglish
Pages (from-to)J151-J154
JournalJournal of Pulp and Paper Science
Issue number5
Publication statusPublished - 1995
MoE publication typeA1 Journal article-refereed


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