Essay On Cold Cream
King Abdulaziz university
Pharmacy school
Department of pharmaceutics
1
Prepared by: Bayan Eshmawi
Cosmetics formulation preparation
Section 1
Cleansing and cold cream ÿ A characteristic feature of true cold creams is the presence of a relatively large amount of water loosely held in w/o mixture. But, the final product would be unacceptable by modern standards due to instability, poor appearance and reproducibility. ÿ Inclusion of Borax in formulations produce a more stable product as it reacts with free fatty acids in beeswax to form sodium soap. ÿ Another important ingredient in formulation is the mineral oil which aids in inhibition of rancidity and improve the stability and whiteness of final product. ÿ Most cold cream contains these ingredients
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ÿ Powder tones the face and gives an even appearance. ÿ Also, some powders with sunscreen can also reduce skin damage from sunlight and environmental stress. ÿ Face powder comes packaged either as a compact or as loose powder. It can be applied with a sponge, brush, or powder puff. Uniform distribution over the face is achieved more easily when a loose powder is applied. ÿ Because of the wide variation among human skin tones, there is a corresponding variety of colors of face powder ÿ Covering power of face powder is its ability to conceal various defect of facial skin including scars, blemishes, enlarged pores and excessive shine. ÿ Main ingredients that facilitate covering powers are: Titanium Dioxide, zinc oxide,
Kaolin, magnesium oxide. ÿ For maximum coverage, formulators need to consider the surrounding medium for these ingredients ‘’ refractive index changes when it’s in water or in petroleum’’ and the particle size ÿ Adhesion characteristics of face powder is imparted by talc, metallic (Zn, Mg) stearate, emollients (cetyl, stearyl alcohols, and glyceryl monostearate), petroleum jelly. ÿ The quality of spreading of face powder and production of smooth feeling ‘’slip’’ are mainly due to talc and
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