1. Lipstick
Katie Monsor

2. Summary
-Lipstick has been used since the time
of the Egyptians
-Over the centuries chemists have been
improving the formula for lipstick
-Requirements chemists must meet:melting,
sweating, long-lasting
Eosin, the red pigment in lipsticks.
Gray=Carbon, Red=Oxygen, Brown=Bromine.

3. 3 Main Processes:
1. Foundation
2.Coloring Agents
3. Additives
Chemistry

4. -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 help
the lipstick to last longer

5. -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 myristate
and other esters
-This creates a smooth substance
when applied to the lips

6. -Chemists use different dyes to create the right shades of
lipstick
-Dyes can be soluble in water. This causes problems with saliva
and 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

7. -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
→

8. -The insoluble lake is then mixed with the castor oil. Which are
then grounded and mixed.
-After a while 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 a
much stronger, bolder color

9. 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.

10. Video