| abstract |
A process for the production of a coloured detergent powder comprises mixing a spray-dried detergent powder with a dyestuff and then treating the resulting mixture with a binder. Preferred dyestuffs are copper and nickel phthalocyanines and Red Carmin Microsol-FBS-X. Suitable binders are aqueous solutions of acrylic or acrylic/maleic polymers, water alone and aqueous sodium silicate, potassium or sodium triphosphate or sugar. The coloured powder may be used to provide "speckles" in a white detergent powder |