Abstract: Process for dyeing keratinous fibres, comprising the step of applying to these fibres at least one composition A containing, in a medium appropriate for dyeing, at least one mono- or di-hydroxyindole the application of the composition A being preceded or followed by the application of a composition B containing, in a medium appropriate for dyeing, at least one quinone derivative chosen from ortho- or para-benzoquinones, monoimines or diimines of ortho- or para-benzoquinones, 1,2- or 1,4-naphthoquinones, sulphonimides of ortho- or para-benzoquinones, .alpha., .omega.-alkylene-bis-1,4-benzoquinones, or 1,2- or 1,4-naphthoquinone-monoimines or -diimines; the mono- or di-hydroxyindoles and the quinone derivatives being chosen such that the oxidation-reduction potential difference .DELTA.E between the oxidation-reduction potential E.sub.i of the mono- or di-hydroxyindoles, determined at pH 7 in a phosphate medium on a vitreous carbon electrode by voltametry, and the oxidation-reduction potential E.sub.

Abstract: According to this process, (a) a compound capable of entering the surface interstices of the keratinous fibres is chosen; which is capable of producing, in an aqueous medium, a solution which is colored naturally or capable of being colored by a development, and capable, under the conditions of the process, of being stable and maintained at a pH such that no ionic charge appears; (b) an aqueous immersion solution containing the compounds chosen is prepared; (c) a specimen of the fibres to be studied is immersed therein to produce an "uptake" of the compound on the fibres, which is a function of their surface state; (d) the specimen is withdrawn from the solution and the excess of solution saturating the fibres is removed; (e) the compound present on the fibres is extracted by immersing the latter in at least one aqueous bath at the same pH as that of the aqueous immersion solution to obtain an extraction solution which is colored or whose color is developed in a step (f); and (g) the state of the surface of t

Abstract: A process for evaluating the ionic state of the surface of keratin fibers, especially human hair, which comprises taking at least one sample of fibers from the fibers to be evaluated, contacting the sample with an acidic solution of at least one acidic or basic dyestuff, assessing what, if any, change in the color of the solution has taken place and attributing the ionic state to the surface of the fibers accordingly.

Abstract: A process for evaluating the ionic state of the surface of keratin fibers, especially human hair, which comprises, taking at least one sample of fibers from the fibers to be evaluated, contacting the sample with an acidic solution of at least one acidic basic dyestuff, assessing what, if any, change in the color of the solution has taken place and attributing the ionic state to the surface of the fibers accordingly.

Abstract: A process for assessing the state of surface oxidation of keratin fiber(s), especially human hair, which results following treatment with, inter alia, peroxides and bromates. This process involves applying a porous support to the wet fiber(s) to be assessed, which support has previously been impregnated with an oxidation indicator which is a solution of iodide ions, the normality of which is from 0.2 N to 10 N, the solution also containing from 20 g/liter to 200 g/liter of solubilized starch in a buffered acid medium, and, while the porous support is in contact with the fiber(s), applying to the support a solution of a strong acid, as developer, and subsequently removing the support and examining whether or not there has been a change in the initial coloration of the support.

Abstract: Apparatus for measuring the secretions of sebum of a skin sample of a living subject comprises a frosted glass plate spring urged to project from a casing (using a calibrated spring). When pressed against the forehead of a living subject the frosted plate retracts yieldably to collect sebum under reproducible conditions.A reference scale inside the casing of the apparatus is illuminated from a known light source and is observed from outside by looking through the greasy plate. The sebum secretion is measured by changing the position of the scale, or changing the line thickness of a reference mark on the scale until a sharp, fine image of the reference mark can be seen.

Abstract: A process for improving the appearance of oily hair or skin, including the scalp, comprises applying thereto an effective amount of an aqueous or hydroalcoholic solution of gelatin present in an amount of about 0.5 to 1.5 percent by weight thereof.

Abstract: A deodorant composition which prevents the formation of unpleasant odors due to bacterial decomposition of perspiration comprises a cosmetic carrier and, as the active component, a mixture of at least one weak organic acid and at least one salt of a weak organic acid and an aminated organic compound. The composition on application to the desired area of the body maintains the pH of the perspiration at a value of about 3 to 6.

Abstract: A process for nonpermanently dyeing human hair comprises applying to the hair a dye composition prepared immediately before application of the same to the hair, the composition comprising an aqueous solution of a solid anhydrous dye selected from the group consisting of indamine, indoaniline and indophenol hair dyes, present in the composition in amounts of 0.0005-2 percent by weight thereof.

Abstract: A dye for coloring hair is one of an indamine, indoaniline, indophenol, diaminobenzoquinone or mixtures thereof which is lyophilized from a solution of the dye in an organic solvent or in an aqueous solution of the organic solvent by freezing the solution at a temperature of -200.degree. to -60.degree.C, and then subliming the frozen solution under a vacuum at a temperature lower than the melting point of the frozen solution. The thus lyophilized dye can be desorped to eliminate, if necessary, residual moisture. The lyophilized dye can be solubilized in an aqueous solution to produce a hair dye composition and can be present therein in amounts of about 0.0005-4 percent by weight of said composition.

Abstract: A process for producing a dye in powder form involves reacting an oxidation agent with an oxidation base in an aqueous alkaline medium, preferably an ammoniacal medium, having a pH ranging from 8 to 13, in the presence of an organic solvent for the dye being produced, at a temperature and during a period of time allowing at least a partial oxidation, preferably between 15.degree.-30.degree.C for a period of about 5 minutes to 30 hours and lyophilizing the resulting reaction product. The resulting dye can be used to color keratinic fibers, especially human hair.

Abstract: Process for improving and modifying the cosmetic properties of living human hair comprising transforming about 25 to 70% of the cystine in hair that is not subjected to any extension stress into lanthionine. The process is carried out with an aqueous medium having a pH between about 10.5 and 13 containing at least one alkali or alkaline earth metal hydroxide.

Abstract: A process for producing a dye in powder form involves reacting an oxidation agent with an oxidation base in an aqueous alkaline preferably ammoniacal medium having a pH ranging from 8 to 13 at a temperature and during a period of time allowing at least a partial oxidation, preferably between 15.degree.-30.degree.C for a period of about 5 minutes to 30 hours and lyophilizing or spray-drying the resulting reaction product. The resulting dye can be used to color keratinic fibers, especially human hair.