Colouring composition comprising starch derivatives as a hydrocolloid
The present invention relates to a colouring composition to be used in the manufacture of food and pharmaceutical products.
1. A water-dispersible composition comprising at least one hydrophilic or hydrophobic, water-insoluble solid pigment comprising metal chelates of carminic acid, and at least 5 wt % of at least one starch octenyl succinate derivative as a hydrocolloid.
2. The water-dispersible composition according to claim 1 , wherein the solid pigment is insoluble in aqueous media at below neutral pH but soluble in aqueous media at a pH in the alkaline range.
3. The water-dispersible composition according to claim 1 wherein the solid pigment has an average particle diameter of less than 10 μm.
4. The water-dispersible composition according to claim 1 wherein the solid pigment has an average particle diameter of less than 5 μm.
5. The water-dispersible composition according to claim 1 wherein the solid pigment has an average particle diameter of less than 2 μm.
6. The water-dispersible composition according to claim 1 wherein the at least one hydrocolloid is present in an amount of at least 10 wt % based on the total composition.
7. The water-dispersible composition according to claim 1 wherein the at least one hydrocolloid is present in an amount of at least 20 wt % based on the total composition.
8. The water-dispersible composition according to claim 1 having a water content of more than 5 wt % based on the total composition.
9. The water-dispersible composition according to claim 1 having a water content of less than 5 wt % based on the total composition.
10. A water-dispersible composition obtained by preparing a suspension of at least one hydrophilic or hydrophobic, water-insoluble solid pigment comprising metal chelates of carminic acid by comminuting the pigment in the presence of at least 5 wt % of at least one starch octenyl succinate derivative as a hydrocolloid in an aqueous media.
11. The water-dispersible composition according to claim 10 wherein the solid pigment has an average particle diameter of less than 10 μm.
12. The water-dispersible composition according to claim 10 wherein the solid pigment has an average particle diameter of less than 5 μm.
13. The water-dispersible composition according to claim 10 wherein the solid pigment has an average particle diameter of less than 2 μm.
14. The water-dispersible composition according to claim 10 wherein the at least one hydrocolloid is present in an amount of at least 10 wt %.
15. The water-dispersible composition according to claim 10 wherein the at least one hydrocolloid is present in an amount of at least 20 wt %.
16. The water-dispersible composition according to claim 10 wherein the water content in the composition is reduced to less than 5 wt %.
17. An edible product comprising a water-dispersible composition according to claim 1 .
18. A pharmaceutical product comprising a water-dispersible composition according to claim 1 .
19. A method of colouring an edible or pharmaceutical product, the method comprising adding to the edible or pharmaceutical product the water-dispersible composition of claim 1 .
20. The water-dispersible composition according to claim 1 , wherein the ratio of the total amount of starch octenyl succinate derivative present to the total amount of pigment present is from 1:2 to 2:1 (weight/weight).
21. The water-dispersible composition according to claim 1 , wherein the composition does not contain an organic solvent.
22. The water-dispersible composition according to claim 10 , wherein the ratio of the total amount of starch octenyl succinate derivative present to the total amount of pigment present is from 1:2 to 2:1 (weight/weight).
23. The water-dispersible composition according to claim 10 , wherein the composition does not contain an organic solvent.