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Application of Dyes and Pigments |
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Colourants
for Agriculture Industry Colourants for Cosmetics Industry Colourants for Printing Inks Dyes in Heat Transfer Printing |
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Colourants for Cosmetics Industry
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Does Hair Dye causes cancer
Hair dye has been often linked to causes of cancer
in the bladder. But new findings have shown that there is no apparent
link between the two. It may be a small factor in a few types of cancer
in the blood cells. If it is, then also it may be very minor. |
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Dyes have found a wide variety of uses in the cosmetics
industry. Be it the hair dyes or lipsticks or nail polish shampoo everywhere
there is wide use of dyes. Let us look at hair dyes. Most of the commercial
hair dye formulas available now are complex, that uses bunchful of
ingredients, and the formulas also differ considerably with manufacturers.
Since we are interested in the dye part let's see what kind of dyes are used
in making of hair dye. The dye chemicals that are used usually consists of
amino compounds, like 4-amino-2-hydroxytoluene and m-Aminophenol. Pigments
of Metal oxides, like titanium dioxide and iron oxide, are also used. The
process of manufacturing hair dye is illustrated in this diagram.
 Types
of ingredients used in the cosmetics |
In the category of decorative cosmetics, the majority of
colors used are pigments. It is the inorganic pigments that are popular with
cosmetics but are subject to purity levels of heavy metals. The range of
inorganic pigments used in cosmetics is generally made up of various
chemical types. A few of the popular ones is provided in the table.
| Pigments | Features and applications |
| Iron Oxides | Three basic shades: black, yellow and red, finds use in liquid foundations, face powders, and blushers. |
| Chromium Dioxides | Shades range from dull olive green, to a blue green, or bright green, finds use in most categories of cosmetic preparations but prohibited for use in lip products in the USA. |
| Ultramarines | Shade range from bright blue to violet, pink and green also, not allowed for lip products in the USA. |
| Manganese Violet | Shade is purple. |
| Iron Blue | Colour is dark blue, used in a wide range of applications. |
White Pigments
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White pigments have a wide use in all cosmetics, they show extremely good covering power, are almost totally inert also extremely stable to heat and light. |
| Mica | Mica gives a natural translucence when used as face powders and powder blushers. |
In addition to this some types of organic pigments are
also used along with water soluble and oil soluble dyes in the cosmetics
application.
Some examples of water soluble dyes are given here.
Some examples of water soluble dyes are given here.
| Dye | C.I. Number | Colours |
| Carotene PS 300 | 75130 | |
| Annato Hydrosouble | 75120 | |
| Carmin of Cochineal | 75470 |