Cold cream

Question 2.4 Why Do Cosmetic Cold Creams Feel Cool ... 

The terminology cold cream aptly describes the soothing and cooling sensation of these cosmetics. Some basic chemistry fundamentals explain this highly marketed phenomenon. 

The cooling sensation experienced after applying a cosmetic cold cream on one s skin is the result of the evaporation of an alcohol (e.g., ethanol) contained in the cold cream. Formulators of skin products include ethanol to achieve a variety of benefits. For example, alcohol enhances the ability of the components in the cold cream to dissolve. For the consumer, the presence of alcohol eases the application of the cream on the skin, enhances the perfume quality of the mixture, and provides a cooling effect on the skin. 

Why do cosmetic cold creams feel cool when applied to the skin See p. 9. 

From the following formula, calculate the amount, in g, of each ingredient required to make 1 lb (avoir.) of cold cream. 

Applied to human skin in patch tests, triphenyl phosphite diluted 1 3 with cold cream... 

A cold cream sample weighing 8.41 g lost 5.83 g of moisture on heating to 110°C. The residue on extracting with water and drying lost 1.27 g of water-soluble glycerol (glycerin). The balance was oil. Calculate the composition of this cream. 

A number of medicines and pharmaceutical preparations are emulsions in nature. It is assumed that in this form, they are more effective. Cod-liver oil, castor oil, petroleum oil are used as medicines which are all emulsions. Asphalt emulsified in water is used for building roads, without the necessity of melting the asphalt. Most of the cosmetics used are emulsions as they permit uniform spreading and promoting the penetration into the skin. Vanishing cream is an O/W type emulsion. Hair creams, cold creams are W/O type emulsions. 

These are emulsions either of oil-in-water (washable cosmetic Vanishing creams) or water-in-oil. The water content allows tiie cream to rub in well. A cooling effect (cold creams) is obtained with both groups as the water evaporates. 

Jimenez SMM, Fresno CMJ, Selles Flores E. Proposal and pharmacotechnical study of a modern dermo-pharmaceutical formulation for cold cream. Boll Chim Farm 1996 135 364-373. 

Prince LM. Beeswax/borax reaction in cold creams. 

Use Organic synthesis, plasticizers, antifoam agent, intermediate, perfume fixative for soaps and cosmetics, wetting agents and detergents, ointments and suppositories, shampoos, toothpaste cold creams, specialty cleaning preparations. 

Cleansing creams and lotions are detergent-based or emulsified oil systems that are designed primarily for the removal of surface oil, pollutants, or cellular debris along with makeup from the face and neck areas. Most emulsified cleansing creams are manufactured similar to cold creams but modified to enhance their debris-removal capability. They usually contain from 15 to 50 percent oils (e.g., mineral oil, vegetable oils, fatty esters, and propoxylated oils) with limited quantities of waxy materials. 

Note-. This is a typical cold cream formulation. The cooling effect comes from the slow evaporation of water from the applied films. The aromatic is added at as low a temperature as possible to prevent its loss by volatilization during manufacture. 

In earlier times lard was used as a base for balsam, then salt-free butter, but now vaseline or petroleum jelly is used, and even cold cream. 

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