chemistry of lipstick (1)

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Lipstick Katie Monsor

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Page 1: Chemistry of lipstick (1)

LipstickKatie Monsor

Page 2: Chemistry of lipstick (1)

Summary

-Lipstick has been used since the timeof the Egyptians

-Over the centuries chemists have beenimproving the formula for lipstick

-Requirements chemists must meet:melting, sweating, long-lasting

Eosin, the red pigment in lipsticks.Gray=Carbon, Red=Oxygen, Brown=Bromine.

Page 3: Chemistry of lipstick (1)

3 Main Processes:

1. Foundation

2.Coloring Agents

3. Additives

Chemistry

Page 4: Chemistry of lipstick (1)

-Oil is most commonly used in lip-coloring since it does not mix with water

-Castor oil is the main oil used in lipstick

-Castor oil is thick and will helpthe lipstick to last longer

Page 5: Chemistry of lipstick (1)

-Chemists use Carnauba wax in lipstick so that it will not melt

-Carnauba wax has a melting point of 85 degrees Celsius

-Waxes can be sticky so chemists mix the waxes with isopropyl myristateand other esters

-This creates a smooth substance when applied to the lips

Page 6: Chemistry of lipstick (1)

-Chemists use different dyes to create the right shades of lipstick

-Dyes can be soluble in water. This causes problems with salivaand the oils.

-Chemists must create dyes that are insoluble in water and oil

-Most dyes are combined with metal oxides

-These dyes are colorless until they are mixed with the amino acids in the lips

Page 7: Chemistry of lipstick (1)

-Other dyes are mixed with white aluminum oxide

-After this process the dyes are mixed with other solutions that create a precipitate

-Equation: Soluble Dye + Precipitate Insoluble Lake

-Lake: A water-soluble dye that is combined with other compounds that are insoluble and colorless

Page 8: Chemistry of lipstick (1)

-The insoluble lake is then mixed with the castor oil. Which are ground and mixed together.

-After further mixing, the oil and lake mixture forms a suspension. The suspension is then mixed with the other ingredients needed

for lipstick.

-The lake method helps the lipstick color to last longer and is amuch stronger, bolder color

Page 9: Chemistry of lipstick (1)

Works Cited Nova. "Putting on a Good Face." Australian Academy of Science.

Nova, n.d. Web. 2010. <http://www.science.org.au/nova/083/083key.html>.

Senese, Fred. "What is the chemical composition of lipstick?" Chemistry of Everyday Life: n. pag. General Chemistry Online. Web. 2010.<http://antoine.frostburg.

edu/chem/senese/101/consumer/faq/lipst ick-composition.shtml>.

Sibley, Lynn. "Lipstick" ["Agyptishes Museum and Papyrussamming"]. Agyptishes Museum and Papyrussamming: 8-11. Print.