The present disclosure pertains to the field of cosmetics and concerns a cosmetic product for changing the natural colour of keratinous fibres, in particular human hair, comprising (i) at least one package (VP) comprising a water-soluble film (F), (ii) at least one cosmetic composition (KM) which is packaged in the package (VP) and contains at least one oxidizing compound, (iii) at least one cosmetic colour composition (FZ) which is packaged in the package (VP), wherein the oxidizing compound is a solid oxidizing agent. Furthermore, the present disclosure relates to a method for colouring hair.

The disclosure provides hyaluronic acid (HA) gel formulations and methods for treating the appearance of the skin. The formulations contain hyaluronic acid and at least one additional ingredient. Methods for treating lines, wrinkles, fibroblast depletions, and scars with the disclosed composition are provided as well.

Assembly containing at least one dyeing substrate and at least one protective substrate comprising one or more preservatives, dispensing means, and dyeing process The present invention relates to the field of dyeing keratin fibres and more particularly to the field of hair dyeing. The present invention relates to an assembly 2 containing at least one dyeing substrate 3, and at least one protective substrate 4a, 4b comprising one or more preservatives, and it being understood that the dyeing substrate(s) 3 are different from the protective substrate(s) 4a, 4b. The present invention also relates to a means for dispensing 1 the assembly 2, and also to a process for dyeing keratin fibres using said assembly 2.

The present invention relates to a process for treating hair wherein hair is applied two compositions one after another with an optional rinse off step in order to increase effectiveness of the active compounds comprised in only in the first composition applied onto hair.

A first subject of the present disclosure is a special oxidant preparation for oxidative coloring of keratinous fibers, more particularly human hair, included in a cosmetic carrier (A) hydrogen peroxide and (B) at least one acid from the group of sulfuric acid, hydrochloric acid, phosphoric acid, lactic acid, citric acid, malic acid, tartaric acid, maleic acid, succinic acid, oxalic acid, ascorbic acid, phytic acid, gluconic acid, nitric acid, malonic acid, acetic acid and-or C.sub.3-C.sub.22 alkane carboxylic acids, wherein the oxidant preparation has a pH value of from about 0.5 to about 3.0. Additional subjects of the present disclosure are methods for oxidative color changing of human hair in which this special oxidant preparation is used.

The present invention relates to dissymmetric azomethine direct dyes of formula (I) and the leuco forms thereof of formula (II), and also to the use thereof for dyeing keratin fibres, in particular human keratin fibres such as the hair: ##STR00001##
in which formula (I) or (II) R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, n and n are as defined in the description. The compounds of formula (I) or (II) according to the invention can give powerful, chromatic and sparingly selective colourings with good colour build-up, which are resistant to the various attacking factors to which keratin fibres may be subjected, such as inclement weather, light, washing and perspiration.

A hair cosmetic comprising the following components (A) and (B) at a mass ratio of component (B) to component (A), (B)/(A), of 0.7 or more and 5.0 or less:

(A) an aromatic sulfonic acid having a molecular weight of 300 or less or a salt thereof; and

(B) a cationic polymer having a cationic charge density of 4.5 meq/g or more.

The invention relates to a hair dye system. The hair dye system includes at least one dye precursor, an oxidizing agent, and a catalyst. The catalyst is a homogeneous catalyst or a heterogeneous catalyst and the dye system has a viscosity of less than about 2,500 mPa-s, when measured at a shear rate of about 25 s.sup.1 and at about 25 C.

Disclosed is a convenient single-agent-type self-oxidative hair dye that has the same effect as a conventional hair dye, which is used by mixing a hair dye as a first agent with an oxidizing agent as a second agent, by incorporating a dye having a benzenetriol structure as a self-oxidative dye that strongly absorbs oxygen in the air to cause oxidation in order to solve the problem of defective or insufficient dyeing occurring due to shortage of oxygen required for polymerization when dyeing hair using only the hair dye as the first agent without an oxidizing agent.

A dye composition I may include: a) oxidative dye(s); b) anionic polymer thickener(s); and c) antioxidant(s) including thiol-derived reducer(s). A kit may include (1) the dye composition I and (2) oxidizing composition II, including at least one oxidant. The oxidation base may include a para-phenylenediamine, bis(phenyl)alkylenediamine, para-aminophenol, ortho-aminophenol, heterocyclic base, or mixture thereof, optionally in addition salt form.