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Soak the scoured cotton in a 10% solution of Sumac Extract for 3-6 hours, or overnight. When removing, gently squeeze but do not rinse. Leave as much of the liquid in as possible. Let the cotton dry completely, whether on a clothesline in direct sunlight or in front of a heat source. Make a mordant bath of 20% alum, to which is added 5% soda ash dissolved in a cup of cool water. Heat the mordant bath to 130F, insert the cotton, and work it in the bath for 3 minutes (for tshirt cotton) to 5 minutes (for broadcloth). Remove, gently squeeze out excess, and let dry completely. Make a dyebath using 12% cochineal, acidified to PH5 with cream of tartar. Heat to 170F, insert the dry cotton (which should now have a sort of yellowish cast from all the tannin and alum in it), then quickly bring to a boil and boil for 1 hour. Remove from heat and let cool. Remove cotton wearing rubber gloves, wring out well, and hang up to dry. After 24 hours of drying, rinse well in a fixing bath with a teaspoon or two of Synthrapol at 180F.