Composition containing a photo-activator for improved bleaching

D - Textiles – Paper – 06 – L

Patent

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D06L 3/04 (2006.01) C11D 3/00 (2006.01)

Patent

CA 1163403

ABSTRACT Bleach compostions comprising a weakly colouring to non- colouring porphine photo-activator and process for bleaching substrates or liquids using said porphine photo-activator are disclosed. The porphine photo-acti- vator used and as defined herein is selected such that the lowest energy allowed electronic transition of the photo-activator molecule gives rise to an absorption band (Q band) with maximum intensity at a wavelength greater than 700 nm.

392785

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