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printech, November, 2002
Pigment Question


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From: Wayne Pferdehirt (pferdehi@epd.engr.wisc.edu)
Date: Fri, 22 Nov 2002 10:11:03


Printech subscribers: I am forwarding this message from the P2tech listserv. I thought that perhaps someone might have some insights to contribute. Post responses to Printech and I will be glad to forward to P2tech.
Thanks,
Wayne

Hello, I am working on a project for a paper mill, which pulps, bleaches and dyes softwood and hardwood fibers. We are trying to encourage them to use less bleaching for paper that they are going to subsequently color. In this case they produce pink and yellow form stock for carbonless paper forms. Is more or less pigment needed for papers that are unbleached or bleached less than ISO 88 to 90, before coloring them pink or yellow? Also would there be benefit to using non-wood pulp for this type of application ie. less pulping, bleaching, or coloring chemicals?



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