Abstract: Described is a method of reducing transcutaneous passage of an orthodiphenol oxidation dye by adding a catalytic system of Mn(II) or Zn(II) salt or oxide and at least one alkaline or alkaline earth hydrogenocarbonate to the orthodiphenol oxidation dye composition.

Abstract: A composition for coloring keratin fibers comprises, a physiologically acceptable medium and an efficacious quantity of at least one coloring material precursor selected from the compounds containing at least one aromatic ring having at least two hydroxyl groups borne by two adjacent carbon atoms of the aromatic ring, an efficacious quantity of at least one oxidation base of the para or ortho type selected from the aromatic amines, and an efficacious quantity of a catalytic system comprising a first constituent selected from the group consisting of salts and oxides of Mn(II) and/or Zn(II) and their mixtures, and a second constituent selected from the group consisting of alkali hydrogen carbonates, alkaline earth hydrogen carbonates and their mixtures. Keratin fibers may be colored by the application of this composition thereto.

Abstract: The invention relates to a process for dyeing wool-containing fibre materials with anionic dyes, which comprises dyeing said materials in the presence of a wool protective agent containing at least one compound of formula ##STR1## wherein the variables are as claimed in the claims. Rubfast level dyeings with no impairment of wool quality are obtainable by said process.

Abstract: A method is described for dyeing fibrous materials made of or containing wool with anionic dyes, which comprises dyeing these materials in the presence of a wool preservative comprising at least one compound of the formulaR--CH.sub.2 --CH(OH)--CH.sub.2 --Y (I),where the variables are as defined in the claims. Rub-fast level dyeings are obtainable without deterioration in the quality of the wool.

Abstract: On testing triphendioxazine reactive dyes it was found that they are unsuitable for almost all conventional single-step printing processes since they are not stable under these conditions.In the course of the development of an uncomplicated single-step printing process for these dyes, it has been found according to the invention, then, that by replacing the customary fixing alkali (NaHCO.sub.3) by stoichiometrically specific amounts of sodium acetate or sodium trichloroacetate or certain mixtures of sodium trichloroacetate and sodium acetate it is possible to fix triphendioxazine reactive dyes in full yields without change in hue. In addition, it is possible to print conventional print pastes.