SKIN CARE
BEAUTY LAB
By: Lavanya Jeyadevan
Health Care
Ms.Tran
TPJ 3M0
INTRODUCTION:
The intention of this experiment is to find out what lotion of the three we choose will take the
longest to dry up when applied to vegetable skin and is heated.
PURPOSE: To find out which lotion will stay for the longest.
HYPOTHESIS: If I did an experiment to see which lotion will take the longest to dry on vegetable
skin, then it would be the Lubriderm lotion.
MATERIALS:

2 glass dishes

Timer

3 different types of lotion

Hot plate

Paint brush

Stereomicroscope

Microscope slide

Scissors

A cup of water

Paper towel

A pair of forceps

A pair of tweezers
PROCEDURE:
1. Cut as many of the skin specimens you need for this experiment, make sure they
have same dimensions
2. Put them in the cup containing water to keep them from drying out, except
for 1 piece (call it piece A)
3. Observe that piece A under the microscope, record and label your observation
4. Put the piece A aside on a glass dish
5. Take another piece of your specimen from the cup (call it piece B)
6. Carefully dab it on paper towel to soak away the water, try not to damage it physically
7. Use the paint brush to thinly spread on the lotion on both sides of piece B
8. Place piece B on a glass dish, note the lotion used
9. Put both glass dish on the hot plate, immediately start the timer
10. Crank the dial to maximum. Be careful with handling hot plate!
11. When piece A looks “dry”, note & pause the time, turn the hot plate off
12. Remove both glass dish off the hot late using the forceps
13. Gently wipe off the lotion on piece B using a paper towel
14. Observe piece B and piece A under the microscope, record & label your observations
15. If piece B does not look as dry as piece A, reapply the lotion on piece B and reheat only
piece B
16. Repeat steps 12-15 every 3 minutes until piece B is as dry as piece A (course only for
piece B NOT piece A)
17. Note the time length
18. Take out two other pieces of skin specimen from the cup, carefully dry them
19. Repeat steps 4-17 for the other two lotions
OBSERVATIONS:
3)
INNER SKIN
OUTER SKIN
1

3
LUBRIDERM LOTION:
-
PieceB with Lubriderm lotion dried in 3 minutes and 7 seconds
PieceA (no lotion)
Inner skin
Outer skin
- Cracks
- Burnt
- Burnt
- Less sparkly
- Reddish
- Black spots
PieceB (with lotion)
Inner skin
Outer skin
- Cracks
- Cracks
- Not sparkly
COCOA BODY BUTTER:
-
PieceB with Body Butter lotion dried in 12 minutes and 15 seconds
-
PieceB was reheated an addition of two times
PieceA (no lotion)
Inner skin
Outer skin
- Cracks
- Burnt
- Burnt
- Less sparkly
- Reddish
- Black spots
PieceB (with lotion)
- Looks wet
- Not dry
- No cracks
NIVEA LOTION:
-
PieceB with Nivea lotion dried in 6 minutes and 39 seconds
-
PieceB was reheated one more time.
PieceA (no lotion)
Inner skin
Outer skin
- Cracks
- Burnt
- Burnt
- Less sparkly
- Reddish
- Black spots
RESULTS:
After observing all three lotions, I found that Body Butter is the best lotion compared to Nivea
and Lubriderm. It took the longest to dry up so that shows that if it is applied to the human
body, it will stay on the skin for long.
CONCLUSION:
So overall the purpose of this experiment was to choose three lotions and figure out by
experimenting on fruit or vegetable skin to see which one will last the longest. At the
beginning, I took a guess and predicted that Lubriderm would last the longest. In the end, my
hypothesis was wrong because after all the testing, I found out that cocoa body butter is the
long lasting lotion when compared to Nivea and Lubriderm. The Lubriderm lotion ended up
taking the least amount of time to dry.
DISCUSSION:
1.
Of the three lotions that you have tested, which one is the best moisturizer of your skin specimen?
Explain why.
After testing three different types of lotion, cocoa body butter, Lubriderm and Nivea, we
came to a conclusion that Cocoa body butter is the best moisturizer. We came up with this
assumption because Cocoa body butter took the longest to dry when applied on beet and heated.
The lotion took 14 minutes and 15 seconds while Lubriderm took 3 minutes and 7 seconds and
Nivea took 6 minutes and 39 seconds.
2.
How is the pricing for the different lotions? Compare the cost and value of these lotions.
The pricing for the lotions do not differ as much. The pricing of the lotion was different by a
dollar or two but the most expensive lotion was cocoa body butter and it was the one that lasted
the longest when experimenting all of the lotions. Lubriderm was the least expensive and was
the one that took the least amount of time to dry. So when comparing the cost for the lotion and
the quality, the more expensive the better. This may not be the case at all times but for my
experiment, that is what was shown.
3.
What are the ingredients in these lotions? Are there any differences in the ingredient list?
-
If yes, explain how this might have affected the result (do research on the functions of the
ingredients)
-
If no, explain what might have caused the different moisturizing effect on the skin specimen
The ingredients in all three lotions vary. The ingredients for the cocoa body butter is Aqua
(Water) (Solvent/Diluent), Glycine soja (Soybean Oil) (Emollient/Skin Conditioner), Theobroma
cacao (Cocoa Butter) (Emollient), Butyrospermum parkii (Shea Butter) (Emollient), Glycerin
(Humectant), Cyclomethicone (Emollient), Glyceryl Stearate (Emuls) The ingredients for
Lubriderm are Water, Butylene Glycol, Mineral Oil, Petrolatum, Glycerin, Cetyl Alcohol,
Propylene Glycol Dicaprylate/Dicaprate, PEG-40 Stearate, C11-13 Isoparaffin, Glyceryl
Stearate, Tri (PPG-3 Myristyl Ether) Citrate, Emulsifying Wax, Dimethicone, DMDM Hydantoin,
Methylparaben, Carbomer, Ethylparaben, Propylparaben, Titanium Dioxide, Disodium EDTA,
Sodium Hydroxide, Butylparaben, and Xanthan Gum. The ingredients for Nivea are Parafinnum
liquidum,
PEG-150,
methylparaben,
butylparaben,
ethylparaben,
isobutylparaben,
propylparaben, simethicone, BHT, parfum, limonene, geraniol, linalool, hydroxycitronellal,
hydroxyisohexyl 3-cyclohexane carboxaldehyde, citronellol. The more different the chemicals
are, the more difference the lotion may have.
4.
What are the “controls” in the experiment and why do you need them?
For this experiment, I found the controls to be the temperature and the amount of
lotion. If the same amount of lotion is not applied to the vegetable skin, the results may differ
because of that. The same goes with the temperature level the vegetable skin is getting heated up
with. The results might change if the temperature is different for the lotions. For example, if
there is more heat for one particular lotion, most likely it will dry up faster compared to a lotion
that had less heat given to it.
5.
Discuss any experimental errors that might be existed with your procedures.
Some experimental errors that took place during the experiment were
6.
Can you trust this results using fruit/vegetable skin to be applied on human skin? Explain your
reasons.
We cannot trust the fruit/vegetable skin results to be applied to human skin because the
structure of the human skin and fruit/vegetable skin is different. We cannot trust the results but
we can use the results to get an idea of how a particular lotion will affect the human skin.
7.
Explain how you can improve the procedure to get results that are applicable to human skin
care?
REFERENCE:
http://www.theecologist.org/green_green_living/behind_the_label/269124/behind_the_label_n
ivea_moisturising_lotion.html
http://www.lubriderm.com/page.jhtml?id=/lubriderm/products/prd_sst_lotion.inc
http://www.thebodyshop-usa.com/body-butter/prod160183