GYPSUM WALLBOARD PAPER HAVING IMITATION MANILA COLORED COATING

摘要

Abstract of the Disclosure:A paper cover sheet particularly designed for use as the face sheetin the manufacture of gypsum wallboard, the face sheet having a baseformed of a plurality of of filler plies formed of recycled paper com-prised of clean hard stocks such as kraft and boxboard cuttings, andbeing free of topliner plies containing flyleaf furnish, the basehaving a coating on the face surface thereof comprising a light coloredmineral filler and a binder. The coating provides a light color to theface surface generally termed "manila". The elimination of the toplinerplies results in a paper of exellent strength and porosity.