| abstract |
PURPOSE: To prevent a dyestuff from discoloring with time and to enhance color development, by adding a specified composition to an anthraquinone and/or carotenoid dyestuff. n CONSTITUTION: 10W50pts.wt. anthraquinone dyestuff (e.g., carminic acid) and/or carotenoid dyestuff (e.g., β-carotene) are compounded with 90W50pts.wt. composition consisting of 10W45wt% sodium tartrate, 2W25wt% alum and 2W25wt% sodium carbonate. When the composition is acid or alkaline, it is adjusted to be slightly acid or alkaline by the addition of a pH adjustor such as a diluted aqueous NaOH soln. or a diluted aqueous mineral acid. n COPYRIGHT: (C)1981,JPO&Japio |