Process for using a phloroglucinol color delta to control blending, deinking and bleaching of groundwood-containing secondary pulp

摘要: A method of processing papermaking fiber includes characterizing the initial color pulp and after treatment with a phloroglucinol stain. The response to stain has been found be better indicator needs for secondary pulps in particular any event is selective untreated groundwood as opposed conventional identification methods. difference used target suitable product pulp, aid bleaching/deinking strategy or enable optimization blending products. In preferred embodiment process determining changes CIE L*, a*, b* brightness values before staining pulp.