Hair removal products

Colophony, a natural unmodified gum resin from Pinus species (terebinth), used in cosmetics such as mascara, lipsticks, creams, and hair removal products, is a known contact allergen. Modifications have been made to colo-phonium, resulting in a variety of ester gums. 

Similar to other hair preparations that are formulated to modify the molecular configuration of hair, hair-removal products typically contain thioglycolate salts to dissolve the keratin protein. Because of the caustic nature of these products, care should be taken to minimize irritation to the surrounding skin. 

The skin becomes more sensitive to the sun, perfumes and detergents. In fact, right from the start of treatment, the skin becomes more sensitive to any irritant beware of chemical hair removal products, waxes, dyes, etc. 

Semipermanent hair color products have the advantage of being removable if a consumer is not satisfied with the result, the color is gradually washed out of the hair. The products are perceived as very gentie. The ease of removal of these products is also a disadvantage because a consumer needs to reapply the color after every 6—8 shampoos to maintain the color. 

Temporary hair colorants are removed from the hair by a single shampoo. Temporary hair colorants usually employ certified dyes that have tittle affinity for hair (see Table 9). They are incorporated into aqueous solutions, shampoos, or hair-setting products. 

Hair Removers. Hair removers are designed to remove hair from the skin surface without cutting ia order to avoid uadesirable stubble. Cosmetic products have beea developed for chemical destmctioa of hair, that is, depilatioa, and for facilitating mechanical hair removal, that is, epilation. 

How Do Hair Coloring Products Remove Gray in Hair ... 

Hair removers, 7 859-860 Hair treatments, silicones for, 22 593, 594 Hair waving/straightening products, 7 858-859... 

Applications Sodium sulfide is mainly used in tanning as a hair-removing agent (so-called asher). It is also utilized in ore flotation, dyeing with sulfur dyes in the textile industry and in the chemical industry e.g. for the precipitation of heavy metal ions. Anhydrous sodium sulfide is also utilized in the manufacture of polyphenylenesulfide (PPS), a high temperature-resistant plastic. The current production of sodium sulfide in Western Europe is estimated to be ca. 50 10- t/a. 

Applications Sodium hydrogen sulfide is mainly used in the paper industry, for ore flotation, in dye chemistry, in the leather industry for hair removal and in the synthesis of organic chemicals. The 1994 USA production of sodium hydrogen sulfide was ca. 100 10 t/a. 

Untreated hair comprises proteins that exhibit an isoelectric point near pH 3.67 [111], As a result, despite its hydrophobic surface, hair carries a negative charge at the normal pH levels of hair care products. Loss and damage of the surface lipid layer also reduce the hydrophobicity of the hair. This combination of negative charge and hydrophobicity affects the types of soils that bind to hair as well as the ease with which different soils can be removed from the fiber surface. 

Some consumers prefer to be free of visible hair in various parts of their skin. Cosmetic products are available to reduce hair growth by actives which penetrate into the skin. It has been shown that skin penetration of difhioromethylornithine, an active to reduce hair growth from PIT emulsions, is superior to emulsions with larger particle sizes [65]. A related approach for a hair removal lotion uses thioglycolic acid as the active ingredient [66]. 

The original hair spray lacquers of the 1950s were more difficult to remove from hair than the anionic and neutral polymers of today s hair-setting products. However, no systematic study of the ease or difficulty in removing these ingredients from hair could be found in the scientific literature. Gloor [46] has examined the influence of hair spray on reoiling however, no systematic study of the effects of hair spray on the ease of removal of hair lipid has been reported. 

The principles of this study by Wong are being utilized today in semipermanent hair dye products in the following manner. It is well known that diffusion into and removal of dye are faster in weathered tip ends than in the root ends of hair [5]. Thus, blends of dyes are used not only to obtain the right blend at root and tip but also to provide a more even wash fastness in both root and tip ends of hair. For example, blends of single ring dyes diffuse more readily into and are retained more readily in root ends, whereas blends of dinuclear and trinuclear dyes are retained more readily in tip ends [40]. Thus, the proper blending of mononuclear and dinuclear with trinuclear dyes will provide a more even wash fastness to both root and tip areas of hair. 

Products and Uses Various applications include brick mortar, plasters, cements, depilatory (hair remover), disinfectants, water softener, and purifier of sugar juices. Also useful as food additive buffer, firming agent, neutralizing agent, and miscellaneous general purpose food chemicals. Also an important agricultural commodity. 

Products and Uses Used in depilatory and hair-waving products. For hair removal and hair permanents. 

Products and Uses Found in lotion and cream cosmetic products. Useful as a depilatory (hair remover). 

Products and Uses Utilized as an aerating agent, gas refrigerant, and spray propellant in cosmetics, after-shave lotions, deodorants, hair colorings, hair curling products, dandruff removers, and detergents. Used as a disinfectant, cleanser, sterilizer, for fungicide and mildew control, and others. 

Products and Uses The active chemical in depilatories (hair removers), permanent wave solutions, and hair-straightening products. Used in hair-curling, removing, and processing products. 

Acids, alkalis, buffers, and neutralizers which maintain an acidity level that prevents skin irritation and maintains product formulation. As raw materials, including citric acid, ammonium carbonate, calcium carbonate, and tartaric acid, these are potential sources of corrosivity. Other cosmetics, like depilatories (cuticle and hair removers), are corrosive by function. 

Aim 1. Removal of sebum, sweat components, scales of stratum corneum, hair styling products and dirt. 

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