Color temporary hair

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. 

In the United States the use of coal-tar dyes ia eye makeup is geaerally prohibited. The use of permanent and temporary hair colorants (Tables 16 and 17) and of organic dyes and their lakes is precluded. As a result, only iasoluble inorganic pigments can be used (Table 9). The sensitivity of the eye... 

Cosmetic applications require specific effect pigments that are approved for use according to cosmetic regulations. The applications of these pigments include color cosmetics (lipsticks, eyeshadows, blushers, eye pencils, make-up, mascaras, nail lacquers), personal care products (shampoos, body washes, lotions, creams, oral care products, hair gels), and special effect items (theatrical and costume make-up, temporary hair color sprays) [5.164]. 

Hair coloring products are either temporary or permanent. Temporary hair colors attach to the surface of hair and wash out after repeated shampoos. 

Both Corbett [5] and Kirkland [60] have summarized the results of several common hair dye ingredients in in vitro mutation tests, in dominant lethal animal testing, and in epidemiological studies. One of these testing programs consists of a Cosmetics, Toiletries and Fragrance Association (CTFA) study involving more than 35 oxidation dye components and 34 textile dyes used in temporary hair color products. From this work and other studies, the FDA has determined (in October 1979) that all hair dye prod-... 

Darkening or adding color to hair can be accomplished by several different treatments. The simplest process involves applying a dye of the desired color to the hair. However, because dye molecules are fairly large, they only coat the surface of hair strands the hair color is only temporary and will wash out after several shampoos. In more permanent coloring of hair, two or more components (usually smaller molecules) are added to hair. These molecules diffuse into hair strands and react to produce a larger, colored molecule. Because the molecule is formed within the hair strand, it tends to stay there, producing permanent color. 

Semipermanent dyes refer to formulations that dye the hair without the use of hydrogen peroxide to a color that only persists for 4-6 shampooings. The objective of temporary hair dyes or color rinses is to provide color that is removed after the first shampooing process. 

Modem hair colorants can be divided into temporary, semipermanent, and permanent systems. These categories are characterized by the durabiUty of the color imparted to the hair, the type of dye employed, and the method of apphcation (see Dyes and dye intermediates). 

Hair Colorants. Hair colorants are commonly divided into temporary, semipermanent, and permanent types. Decolorizing (bleaching) represents a fourth type of hair coloring (81) (see Bleaching agents). 

With direct dyes (see Section 3.3), as opposed to oxidation dyes, the actual dye (and not its precursor) is applied to the hair. It imparts a semipermanent or temporary color that lasts for a variable time. Lightening is not possible. 

The dyeing process provides for temporary, semipermanent (direct dyes), and oxidation-type reactions (semipermanent or permanent colors). It may involve absorption or adsorption (electrostatic) of the colorant into/to the hair structure, bleaching or otherwise masking the natural melanin col-... 

Henna. Henna is the oldest and most widely used vegetable dye utilized in hair coloring. A temporary chestnut color is produced in blond or auburn hair by applying a paste of henna flowers and leaves ground in hot water immediately before use. (The dye is unstable in aqueous solution.) The addition of indigo achieves darker blue-black shades extracts of walnut shell or logwood enhance brown coloration. 

Darkening the natural color of the hair can be accomplished through the action of temporary dyes that act similarly to a hair conditioner. Most temporary chemical dyes contain the salts of large acidic molecules (e.g., FD C Blue No. I) that do not easily penetrate the hair outer cuticle. A colored film forms over each hair and washes off with the action of a... 

HEALTH SYMPTOMS inhalation (unconsciousness, weakness, muscle pain, kidney problems, myalgia, anuria, polyuria, temporary coma) ingestion (bitter taste, headache, nausea, vomiting, diarrhea, dizziness, yellow coloration of the skin, anuria, hepatitis, hematuria, albuminuria) contact (sensitization dermatitis on the face, formation of papules and vesicles, staining of skin and hair). 

Temporary dyes or color rinses are acid dyes [6-8] similar to those used in wool dyeing. However, because color rinses are used at room temperature, the dyes do not diffuse into the hair or bind firmly, and they may be removed by a single shampooing. 

Damage to growing cells may cause temporary loss of hair (alopecia), skin rashes, changes in the color and texture, or loss of fingernails and toenails. These toxicities are usually reversible. 

Hair coloring preparations are classified into four types temporary dye, metallic (progressive) dye, ionic (acidic and basic) dye, and permanent (oxidative) dye. The oxidative dye is the most popular hair dye because of its color durability and easy application. Oxidative dyes are usually composed of dye compounds (A) solution and a hydrogen peroxide (B) solution. Both solutions are creamy. The A solution also contains strong alkaline ammonia to open hair cuticles. Dye components polymerize into indophe-nol-like trimers, etc., in the presence of hydrogen peroxide, primarily in the cortex of the hair. Hairs 3 cm long dyed by oxidative dyes of 34 brands are dissolved in the solution of methanol plus 3 mol 1 ... 

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