Due to the presence of the pigment curcumin, it reveals an orange colored surface.
For this reason, it is used as a natural food coloring in dairy products, beverages, mustard and pasta, among others. Crushing the tuber, it is an oil soluble pigment but can be water-soluble by emulsion technologies. Powder formulations are also produced by spraying in a suitable carrier.
Chlorophyll is the green pigment present in all plants and algae that photosynthesize, this is widely used as a natural color additive in processed foods. It is extracted from green plants that are dried prior to solvent extraction, which results in an oil soluble product that is standardized with vegetable oil.
By varying the processing parameters, they give rise to different types of chlorophyll pigments, each with a slightly different shade of green.
These are used in different ways to obtain a wide range of hues from olive to bluish green in foods and beverages.
Dye made from cochineal is used for ice cream, puddings, drinks, biscuits, cakes, jellies, and other pink or red candy, in order to increase the attractiveness and acceptability of the product in front of the consumer.
Annatto has been used as a food coloring for centuries and contains bixin which is extracted from the seed coat and is a soluble oil. It is suitable for fat and oil based applications such as margarine and other fat hydrolysis results in a second water-soluble application such as fine confectionery, breakfast emulsions as well as extruded snack foods.
The extraction of annatto using alkaline process produces norbixin, which is suitable for cereals, cheeses, confectionery, salad dressings and the cold industry.