Patent ID: 6589389
Filing Date: 2003-07-08
Classification: D21B,D21C,D21G,G01N,Y02W,Y10S

Abstract:
A test method for measuring the bleedthrough contaminant content of a fiber pulp, comprising:obtaining a sample of the pulp; forming a paper web from the sample of the pulp; applying heat to the web within a range from about 280Â° F. to about 360Â° F.; pressing the web within a range from about 8 psi to about 16 psi; drying the web to form a sheet; melting the bleed-through contaminants; enhancing the contrast between areas of the sheet having bleed-through contaminants and areas of the sheet not having bleed-through contaminants; and analyzing the contrasted sheet for quantifying the level of contamination with contaminants that produce bleed-throughs.