Science Project:

Will Refrigerating Cosmetics Extend Their Longevity?

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Research Questions

  • Refrigerators preserve food, but will they do the same for cosmetics?

Terms to Know

  • Refrigeration
  • Bacteria
  • Shelf life
  • Formulation

Materials

  • 2 new, unopened eyeliner
  • 2 new, unopened mascara
  • 2 new, unopened eyeshadow
  • A small compact fridge (not the one where you store your food)
  • Magnifying glass
  • Microscope
  • Pen/paper for notes

Experimental Procedure

  1. Open and break the seals of all the cosmetics.
  2. Close the lids back up.
  3. Put one of each of the eyeliner, mascara, and eyeshadow in the fridge.
  4. Put the remaining cosmetics at room temperature.
  5. Do not use any of the items you are testing with.
  6. Observe the cosmetics with a magnifying glass and a microscope every two weeks for three to six months.
  7. Compare which group had more bacterial formation as well as the overall quality, dryness, and texture.
  8. Record your results.

Suggested Chart

Product
Bacteria?
Dryness?
Texture?
Overall Quality?
Refrigerated
Eyeliner

Mascara

Eyeshadow

Room-temperature
Eyeliner

Mascara

Eyeshadow

Bibliography

Author: Jennifer Penn-Chiu
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