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Influence of Chemithermomechanical Pulp on the Colour of Pulps Dyed with Direct Dyes

Research and development

Author:

  • Drzewińska Ewa
    Institute of Papermaking and Printing, Technical University of Lodz, Łódź, Poland

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Abstract:

The dyeability of chemical pulp and chemithermomechanical pulp (CTMP) and their mixtures with direct dyes were investigated. It was found that direct dyes were useful mainly for dyeing paper containing chemical pulps, but they can also be used for high-yield pulps (with high lignin content – for example BCTMP), reducing costs as a result of using cheaper fibrous semi-products.When increasing the amount of high-yield pulp in the paper product, we have to take into account that after dyeing the colour may change markedly in comparison to dyed chemical pulps.

Tags: chemical pulp, CTMP, colour, dyeing, direct dyes.

Published in issue no 2 (67) / 2008, pages 105–107.

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