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Cosmetics

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by

Kawehi Mau

on 10 December 2013

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Transcript of Cosmetics

Cosmetics
What is a cosmetic!
"any articles intended to to be rubbed, poured, sprinkle, or sprayed on, introduced into, or otherwise applied to the human body or any part thereof, for cleansing, beautifying, promoting attractiveness, or altering the appearance..." (Chem 100:Notebook)
Skin Creams and Lotions
Used to form protective firm over skin to hold moisture in.
Lotion:
Emulsion of oil droplets dispersed in water.
{feel cool-evaporating water removes heat from skin}
Cream:
(Opposite) tiny water droplets dispersed in oil
{greasy}
Types
Emollients: Protect skin by coating and softening.
Moisturizers: Hold moisture to skin.
Humectants: (ex. lactic & glycerol) attract water to skin.
*Eye Makeup
Mascara
: used to darken eyelashes
- base of soap, oils, fats, and waxes
- Brown- Iron oxide pigements, Black- carbon, Green- chromium (III) oxide (CR2O3), Blue- ultramarine (contians sulfide ions)
- 40% wax, 50% soap, 5% lanolin, 5% color
*Eye Shadow Creams
- base of fats, waxes, petroleum jelly.
*Eye Shadow Powders
- base of talc or cornsilk
- colored by dyes, or pigments -
white-zinc oxide (ZnO) or titanium dioxide (TiO2)
Bibliography
1. http://www.fda.gov/cosmetics/guidancecomplianceregulatoryinformation/ucm074162.htm
2. Chem 100: Notebook
3.YouTube.com
4.http://science.howstuffworks.com/perfume2.htm
5. http://www.merriam-webster.com/dictionary
Eye Makeup
*Perfumes:
extracts of natural materials put together by chemist. (Chem100:Notebook)
Three part smell.
Top Notes: evaporate within the first 15 mins.
Heart Notes: 3-4 hr after. (Flowery and Spices)
Base Notes: 5-8 hr after. Stick to skin. (Musky, watery, woody)
Perfumes should be spread; heat evaporates top notes and weaken overall smell.
*Colognes:
Perfumes that have been diluted with *alcohol or alcohol/water mixtures
Visible Light has enough energy to bust bonds in fragrance molecules
Air corrodes fragrances by oxidation; should be stored in a cool and dark place. 2yr self life
*Aftershave Lotions:
similar to cologne but with higher alcohol content.
Cosmetics Way Back When?
Dates back 7000 years ago.
Egyptians used powered antimony and green copper ore malachite as eye shadow.
17th Century
Men used cosmetics lavishly to cover up their stink smell from not bathing
18th Century
European women whitend their faces with lead carbonate (PbCo3)
By: Kawehionapua Mau
T H E S K I N
*Moisturizers
-holds moisture to skin
-works best after showering
-forms
physical barrier
-hinders evaporation of water from skin
*Sunscreen Lotions
S.P.F (S.P.F30 = 30x longer in the sun)
Physical
- Protect against UV-A & UV-B rays.
(Zinc & Titanium)
Chemical
- Absorbs UV rays before causing damage
(Avobenzone or oxybenzone-protects again UV-A rays)
Paraminobenzoic acid (PABA) vs. Octyl Methoxycinnamate (OCM)
iNGREDiENTS:
Fatty/oily substances-hold moisture in.
Mineral oil and petroleum jelly.
Other oils:
Natural fats/oils, water, propylene gylcol, perfumes, emulsifiers, lanolin (fat from sheep wool), aloe vera gel, beeswax (hardener)
Chemicals used in Cosmetics!
Alcohol SD-40 (ethyl, methyl, benzyl alcohol)
used in emollients
may cause dryness and irritation for sensitive skin
Allantoin
(a crystalline oxidation product
C4H6N4O3
of uric acid used to promote healing of local wounds and infections )
used in creams; reduces skin irritaion
Glycerin
found naturally in skin, used in cream to increase hydration
Mica
Reflectin minerals - shimmer and pearlescence
Moisturizers and Sunscreens
Classified as drugs
Antiperspirants and Antidandruff Shampoo
Aluminum Chorohydrate [Al2(OH)5Cl + 2H2O]) Astringents-constrict pores of sweat glands to prevent perspiration.
Drugs must be proven
"Safe and Effective"
Cosmetics
do not
need to be tested before marketed.
Cosmeceutical - product that contains medicinal or druglike benefits
Cosmetics differ from Drugs
Lipsticks & Lip Balms
made of oil and wax
prevent moisture loss
soften/brighten lips
less protective oils
- skin on lips drys out-chapped lips
oils used:
caster, sesame, or mineral
waxes used:
beeswax, carnauba, candelilla
perfumes added to cover up fatty odor of oil
antioxidants used to decrease rancidinty
Bromo acid dyes
(tetrabromofluoerscein)
- color [bluish-red compound]
Colognes & Perfumes
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