Talc as a Dye-Extender in Colored Papers, 1998 Coating Conference Proceedings
Dye receptivity behavior of five pigments in Tan Kraft color handsheets is presented. At 8% filler level, talc showed the greatest affinity toward dye indicating that significant reduction in dye consumption is possible when talc is substituted for PCC, GCC or chalk in paper machine wet-end. Talc filled sheets were stronger and less porous than those filled with PCC and GCC. Stiffness and bulk results were not influenced by the choice of filler. Large and platy particles of macrocrystalline talc were easier to retain than other pigments.
These results suggest that talc should allow the colored paper producers to achieve significant savings on dye consumption, wet-end starch, retention aid and pulp refining while maintaining paper quality. Low abrasion of talc particles should improve mill productivity by prolonging forming fabric and other converting equipment life.
Talc as a Dye-Extender in Colored Papers, 1998 Coating Conference Proceedings