Red bleaching compositions
The present invention concerns photo-bleaching with Food red 14 (colours Index 45430) and in particular the bleaching of laundry items.
1 . A bleaching composition comprising:
c) from 0.0001 wt/wt % to 0.1 wt/wt % of Food red 14 dye;
d) from 0 to 40% other bleaching species; and,
c) the balance carriers and adjunct ingredients to 100 wt/wt % of the total bleaching composition, wherein upon addition of a unit dose of the bleaching composition to an aqueous environment a wash liquor having a pH in the range 8 to 11 is provided, wherein the bleaching composition comprises less than 1% of a peroxyl species.
2 . A bleaching composition according to claim 1 , wherein the Food red 14 bleaching composition is present in the range of 0.001 to 0.01 wt/wt %.
3 . A bleaching composition according to claim 1 , wherein the bleaching composition comprises other photo-bleaches.
4 . A bleaching composition according to claim 3 , wherein the bleaching composition comprises vitamin K3.
5 . A bleaching composition according to claim 1 , wherein the bleaching composition comprises an air bleach catalyst or ligand thereof.
6 . A bleaching composition according to claim 1 , wherein the bleaching composition is a liquid bleaching composition.
7 . A bleaching composition according to claim 1 , wherein the bleaching composition comprises from 5 to 40 wt/wt % of a surfactant having an HLB greater than 15.
8 . A bleaching composition according to claim 1 , wherein the bleaching composition is devoid of a peroxygen species.
9 . A method of bleaching a textile stain, the method comprising the steps of:
(i) treating a textile with a solution of Food red 14 dye,
(ii) irradiating the treated textile.
10 . A method according to claim 9 , wherein the solution comprises from 100 ppb to 1 ppm of Food red 14 dye.
11 . A method according to claim 9 , wherein the method further comprises a step of drying the textile.