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The Science Behind waterproof Mascara

What makes a substance waterproof? This is what we decided to investigate for a project for our school's science festival. We attended GREENLIGHT FOR GIRLS, an organisation that helps promote STEM studies amongst girls, and got results for our survey
by

Elena Whitehead

on 14 December 2013

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Transcript of The Science Behind waterproof Mascara

The Science Behind WATERPROOF mascara
By Ajra and Elena
Short History
Mascara
3400 B.C.
Mascara was very common in Ancient Egypt amongst women and men.

The very first mascaras were made by blending kohl, honey, water and crocodile dung.
30 B.C.
Eyes were believed to be the windows of the soul, so Egyptians would line their eyes with kohl and use mascara to conceal them and ward off any bad spirits.

Many ancient drawings show Cleopatra with heavy make-up.
19th Century
Victorian women would spend hours getting ready, and would make their own mascaras.
1917
The first packaged cosmetic mascara was produced by Eugene Rimmel.

It was made from a blend of petroleum jelly and black coal dust.
1938
First waterproof mascara was created from a blend of 50% turpentine (resin) .
Main difference?
WATERPROOF
NORMAL
water based
hydrophilic
polar substance
water-soluble ingredients
oil based
hydrophobic
non-polar
EMULSIFICATION
Ever tried mixing water with oil?

You'd have a tough job-they don't mix!

That's because the water molecules attract other water molecules and the same goes for the oil molecules.
This means they stick together.
So how can they mix?
Well, how do you clean greasy pots and pans? With soap!
Soap is an emulsifier.
Survey results: a few facts
55%
prefer using waterproof mascara
37%
said their eyelashes felt damaged using waterproof mascara
52%
can never fully remove waterproof mascara
tall oil glycerides
dimethicone copolyol
carnauba wax
petroleum distillate
Aim
Equipment:
Method
Results
polyethylene
-Derived from Silicone which is an adhesive and a water repellent.

-Prevents the mascara from simply slipping off the lashes.

-Also used in hair products as it increases shine.




- Viscous black odorous liquid.
- Used as an adhesive, a binder and ink.
- Low flammability and low aromatic content.
- It´s a type of hydrocarbon.
- Is a polymer made of many repeating ethylene units.

- Holds together the ingredients.

- Increase the thickness of lipids (oil).

- Beeswax ( wax secreted by bees).
- Copernica Cerifera
- Helps keep an emulsion.

To test the difference between waterproof and normal mascara in different environments in different everyday life activities.
Normal mascara and waterproof was applied to each different side of the eye ( the left side was normal and the right side was waterproof).

Time left to dry is 2 minutes for each eye.

The Girls had to dunk their head in the bowl whilst playing a game of ‘’apple-bobbing’’ to get their face wet .

A picture was taken before and after and as you can see from the pictures, 1 eye should be slightly more smudged than the other .
1.Volunteers ( 6 )

2.Normal Mascara ( Maybelline rocket volume express) and Waterproof ( the colossal volum’ express)

3.Distilled water

4.Bowl filled with approximately 20 cm of Water ( and apples).

BEFORE
AFTER
GREENLIGHT FOR GIRLS
It keeps two different substances mixed together.
Full transcript