Cleansing cosmetics

The word, gel, is ill-defined with regard to cosmetics. Generally, those materials that have high viscosity, and that are homogeneous and trans-parent/translucent are called gels. Gels used for cleansing cosmetics also are used to clean other cosmetic products such as those used for make-up, hair care, and body care. However, the components included are different... 

There are certain drawbacks of classical two-phase titration, such as the use of chlorinated solvents (chloroform) interferences from cocoamidopropyl betaine (a common ingredient of cleansing cosmetics) and difficult detection of the visual end point when nonionic surfactants are present in formulations. However, these drawbacks can be solved... 

Anionic Surfactants. In terms of general usage in cosmetic products, the anionics are by far the most widely used and are chiefly found in shampoo systems. They provide the formulator with the basic conditions for preparing these products, ie, foaming, cleansing, and solubiHty. 

The Food, Dmg and Cosmetics Act defines a cosmetic as a substance intended to be mbbed, poured, sprinkled, or sprayed on, introduced into, or otherwise appHed to the human body or any part thereof for cleansing, beautifying, promoting attractiveness, or altering the appearance. A dmg is defined as an article intended for use in the diagnosis, cure, mitigation, treatment, or prevention of disease in humans or other animals, and articles intended to affect the stmcture or any function of the body of humans or other animals. 

Microcapsules are used in several film coatings other than carbonless paper. Encapsulated Hquid crystal formulations coated on polyester film are used to produce a variety of display products including thermometers. Polyester film coated with capsules loaded with leuco dyes analogous to those used in carbonless copy paper is used as a means of measuring line and force pressures (79). Encapsulated deodorants that release their core contents as a function of moisture developed because of sweating represent another commercial appHcation. Microcapsules are incorporated in several cosmetic creams, powders, and cleansing products (80). 

Cosmetics and Personal Care Products. Alkanolamines ate important taw materials in the manufacture of creams (95—97), lotions, shampoos, soaps, and cosmetics. Soaps (98) formed from triethanolamine and fatty acids ate mild, with low alkalinity and excellent detergency. Triethanolamine lauryl sulfate is a common base for shampoos (99—101) and offers significant mildness over sodiumlauryl sulfate. Diethanolamine lauryl sulfate and fatty acid soaps of mono- and trietban olamine can also be used in shampoos and bubble bath formulations. Chemistry similar to that used in soluble oils and other emulsifiers is appUcable to cleansing creams and lotions (102,103). Alkanolamides or salts ate added to the shampoo base to give a smooth, dense foam (104). 

Oral Cleansing Products. Toothpastes and mouthwashes are considered cosmetic oral cleansers as long as claims about them are restricted to cleaning or deodorization. Because deodorization may depend on reduction of microbiota in the mouth, several antimicrobial agents, either quaternaries, such as benzethonium chloride [121 -54-0] or phenoHcs, such as triclosan [3380-35-5] are permitted. Products that include anticaries or antigingivitis agents or claim to provide such treatment are considered dmgs. 

HCF was especially widely used in Western countries. Until 1972, it was included as an active component in soaps, cleansing creams, shampoo, deodorants, creams, and toothpastes. HCF was used for medical purposes, to control staphyllococcus contamination, in particular in maternity hospitals and in the cosmetics industry it was also used as a preservative, etc. It was used in agricultural formulations as well [67]. Although HCF s toxicity was... 

Surfactants are used in a wide range of fields. By far the most important application is the washing and cleansing sector as well as textile treatment and cosmetics these use over 50% of the total amount of surfactants. Surfactants are also used in the food sector, in crop protection, in mining, and in the production of paints, coatings, inks, and adhesives. The basic manufacturing routes to important surfactants are laid out in Fig. 4.9. It is true that the most important surfactant from the amount produced apart from soap is still the petrochemical-based... 

Alkyl polyglucoside carboxylate (INCI-name Sodium Lauryl Glucose Carboxylate (and) Lauryl Glucoside, Plantapon LGC SORB) is a new anionic surfactant with excellent performance for personal care cleansing applications. In shampoo and shower bath formulations the anionic surfactant shows a good foaming behavior. In body wash applications it improves sensorial effects. These properties make Plantapon LGC SORB suitable for several cosmetic applications, e.g., mild facial wash gel, mild baby shampoo, mild body wash for sensitive skin, wet wipes, and special sulfate-free shampoo applications. 

Patients may use cosmetics, but thoroughly cleanse area to be treated before... 

Patients treated with tretinoin may use cosmetics, but the areas to be treated should be cleansed thoroughly before the medication is applied. 

Personal Care Products. Within the broad definition of synthetic detergents, a variety of cleansing products are made for personal care. These include such products as cleansing bars, shampoos, bubble-bath products, cosmetic cleansers, and tooth pastes. Formulations of these products vary widely, depending upon their intended use. 

From the literature, little is known about the impact of cosmetic products on skin pH. Skin possesses buffering capacity, which protects it against changes of pH. It has been shown that after application of alkaline preparation, elevated outside skin pH decreases back toward acidic values.5,14 21 Such change of pH may occur also after application of a cosmetic product. This issue is barely mentioned in case of stay-on products, like moisturizers. Rinse-off cleansing products are investigated more often, in terms of their influence on skin pH and the correlation between their pH and the irritancy potential. 

Kajs, T. and Gartstein, V., Review of the instrumental assessment of skin effects of cleansing products. J. Soc. Cosmet. Chem. 42 249-271, 1991. 

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