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PROCESS FOR THE MANUFACTURE OF WASHING POWDERS CONTAINING OPTICAL WHITENERS, HAVING A STABILIZED OR IMPROVED APPEARANCE, SOLUTIONS, DISPERSIONS AND PREPARATION OF WHITENERS USED IN THIS MANUFACTURE
PROCESS FOR THE MANUFACTURE OF WASHING POWDERS CONTAINING OPTICAL WHITENERS, HAVING A STABILIZED OR IMPROVED APPEARANCE, SOLUTIONS, DISPERSIONS AND PREPARATION OF WHITENERS USED IN THIS MANUFACTURE