Process of bleaching specialty hair fibers with hydrogen peroxide solutions

Claim 1

METHOD OF BLEACHING A SPECIALTY HAIR FIBER WHICH IS A MEMBER OF THE GROUP CONSISTING OF MOHAIR CASHMERE, ALPACA, VICUNA,AND CARMEL HAIR FIBRES, WHICH COMPRISES CONTACTING SAID FIBRES FOR A PERIODOF TIME AND AT AN ELEVATED TEMPERATURE, SAID TIME-TEMPERATURE RELATIONSHIP BEING FROM ABOUT 10 HOURS AT ABOUT 100*F. TO 30 MINUTES AT ABOUT 130*F., IN WHICH LATTER INSTANCE THE SOLUTION IS PERMITTED TO STAND AND COOL FOR ABOUT 10 HOURS, WITH AN AQUEOUS SOLUTION CONTAINING ON THE WEIGHT OF SAID FIBERS ABOUT 3% OF FERROUS AMMONIUM SULFATE AND ABOUT 2-4% OF A WATER-SOLUBLE SALT OF A REDUCING OXY ACID OF SULFUR WHEREIN THE SULFUR HAS A VALENCE OF AT LEAST 2 BUT LESS THAN 6, SEPARATING SAID FIBRES FROM SAID SOLUION AND WASHING THEN WITH WATER, CONTACTING SAID SEPARATED AND WASHED FIBERS FOR ABOUT 1-2 HOURS AND A ABOUT ROOM TEMPERATURE TO 110*F. WITH ABOUT 20 PARTS BY WEIGHT OF AN AQUEOUS SOLUTION TO ONE PART BY WEIGHT OF THE FIBERS, SAID SOLUTION CONTAINING ABOUT 1-2% OF A STRONG MINERAL ACID AND ABOUT 1.6-2% OF 35% HYDROGEN PEROXIDE, SAID ACID AND SAID HYDROGEN PEROXIDE BEING IN DILUTE AQUEOUS SOLUTION, SEPARATING SAID FIBRES FROM SAID AQUEOUS SOLUTION, AND SEPARATING SAID FIBERS FROM ARATED FIBRES WITH A BLEACHING AMOUNT OF AN AQUEOUS SOLUTION OF HYDROGEN PEROXIDE AT A PH OF ABOUT 8 UNTIL SAID BLEACHING HAS BEEN COMPLETED.