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The Chemistry of Cosmetics

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by

Harper Hodgson

on 6 June 2014

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Transcript of The Chemistry of Cosmetics

What are cosmetics?
A cosmetic is a product applied on the body, usually the face, intended to improve appearance. Examples of cosmetics include makeup (mascara, lip stick), and nail polish.
To add color to cosmetics, chemists add dyes made out of compounds such as coal tar, chromium oxide and aluminum powder.
Makeup is intended to last all day through sweating, eating and drinking, rain or tears and other everyday encounters. To ensure all day coverage, chemists add an oily or waxy mixture, called a base. The base reacts with the acid in a cosmetic, decreasing or increasing acidity. This helps the product stick to your face.
Additives
Fragrances- used to give a pleasing scent to the product and hide the displeasing odor of waxes or oils. Sometimes fragrances are added to give 'flavor' to makeup.
Preservatives- used to make the product last longer.
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Image by Tom Mooring
Coverage
The Chemistry of Cosmetics
Coal Tar
Coal tar is the most common compound used to dye makeup. However, it has been known to cause allergic reactions and may be a carcinogen, although the FDA has approved it for external use
Bulking Agents
Bulking agents smooth out the cosmetic and help it to go on evenly. Talc is used most often in cosmetics, because it has a smooth, slippery texture and absorbs perspiration.
What do chemists do to makeup?
Color
Coverage
Bulking Agents
Additives
The end!
What did you learn?
1.
What is a cosmetic?
2.
What 4 things do chemists do to cosmetics?
3.
How do chemists color cosmetics?
4.
What dye used in makeup is a possible carcinogen?
5.
What kind of mixture is used to ensure all day coverage?
6.
What is a bulking agent?
7.
Why is talc used as a bulking agent?
8.
Why is fragrance used in cosmetics?
9.
What else does fragrance do? (Hint: Smackers lip balm)
10.
Why are preservatives added to makeup?
Full transcript