The present invention relates to an aqueous oxidizing composition comprising one or more oxidizing agent, one or more sugar and/or one or more polyethylene glycol and having a pH in the range of 1 to 5.

Products for oxidative dyeing of keratin fibres include at least two preparations (A) and (B) prepared separately. The first preparation (A) includes, in a cosmetic carrier (A1) hydrogen peroxide and (A2) one or more fatty constituents in an amount of from about 0.1 to about 40 wt. % relative to the weight of preparation (A). The second preparation (B) includes, in a cosmetic carrier, (B1) at least one alkalizing agent and (B2) one or more fatty constituents in an amount of from about 0.1 to about 40 wt. % relative to the weight of preparation (B). Preparation (A) is prepared in a first container and preparation (B) is prepared in a second container, both of which containers include at least two layers. An inner layer of first and/or second containers includes a layer of a synthetic polymer (I). An outer layer of first and/or second containers includes a layer of metal.

Products for oxidative dyeing of keratin fibres include at least two preparations (A) and (B) prepared separately. The first preparation (A) includes, in a cosmetic carrier (A1) hydrogen peroxide and (A2) one or more fatty constituents in an amount of from about 0.1 to about 40 wt. % relative to the weight of preparation (A). The second preparation (B) includes, in a cosmetic carrier, (B1) at least one alkalizing agent and (B2) one or more fatty constituents in an amount of from about 0.1 to about 40 wt. % relative to the weight of preparation (B). Preparation (A) is prepared in a first container and preparation (B) is prepared in a second container, both of which containers include at least two layers. An inner layer of first and/or second containers includes a layer of a synthetic polymer (I). An outer layer of first and/or second containers includes a layer of metal.

An oxidation dye and/or lightener, which is in the form of a preferably transparent hydrogel, has a pH value in the range of 7.0 to 8.8, and preferably after being mixed with an acidic oxidizing agent preparation produces an application mixture having a pH value in the range of 6.0 to 7.3, makes possible intensive coloring or lightening of fibers with reduced hair damage.

An oxidation dye and/or lightener, which is in the form of a preferably transparent hydrogel, has a pH value in the range of 7.0 to 8.8, and preferably after being mixed with an acidic oxidizing agent preparation produces an application mixture having a pH value in the range of 6.0 to 7.3, makes possible intensive coloring or lightening of fibers with reduced hair damage.

Cosmetic agents for treating keratinic fibers and methods for the reductive decolorization of dyed keratinic fibers are provided herein. In an embodiment, a cosmetic agent for treating keratinic fibers includes (a) one or more metal salts chosen from the group of tin(II) salts, iron(II) salts, manganese(II) salts, titanium(II) salts, or titanium(III) salts and (b) water. The agent has a pH between about 1.0 and about 3.0.

Cosmetic agents for treating keratinic fibers and methods for the reductive decolorization of dyed keratinic fibers are provided herein. In an embodiment, a cosmetic agent for treating keratinic fibers includes (a) one or more metal salts chosen from the group of tin(II) salts, iron(II) salts, manganese(II) salts, titanium(II) salts, or titanium(III) salts and (b) water. The agent has a pH between about 1.0 and about 3.0.

Multi-component packaging units for reductively decoloring dyed keratin fibers and methods for reductively decoloring dyed keratin fibers are provided herein. In an embodiment, a multi-component packaging unit for reductively decoloring dyed keratin fibers includes a container (A) that includes a cosmetic agent (a) and a container (B) that includes a cosmetic agent (b), which are produced separately from each other. Agent (a) in container (A) includes one or more sulfur-containing reductants. Agent (b) in container (B) includes one or more metal salts chosen from the group of tin(II) salts, iron(II) salts, manganese(II) salts, titanium(II) salts, or titanium(III) salts.

Multi-component packaging units for reductively decoloring dyed keratin fibers and methods for reductively decoloring dyed keratin fibers are provided herein. In an embodiment, a multi-component packaging unit for reductively decoloring dyed keratin fibers includes a container (A) that includes a cosmetic agent (a) and a container (B) that includes a cosmetic agent (b), which are produced separately from each other. Agent (a) in container (A) includes one or more sulfur-containing reductants. Agent (b) in container (B) includes one or more metal salts chosen from the group of tin(II) salts, iron(II) salts, manganese(II) salts, titanium(II) salts, or titanium(III) salts.

The present invention relates to a method for dyeing hair fibres, in particular a method which involves coating hair fibres with a hair dye composition and directing radio frequency electromagnetic radiation to the coated hair fibres to cause heating within the coated hair fibres by dielectric loss. The present invention also relates to kits and appliances for use in connection with the method, as well as the use of radio frequency electromagnetic radiation in reducing the effective dye-treatment time for hair fibres. In one aspect, there is provided a method of dyeing hair fibres, said method comprising the steps of: i) coating one or more hair fibres with a hair dye composition; and ii) directing radio frequency electromagnetic radiation having one or more frequencies from 1 MHz to 300 MHz to the one or more coated hair fibres to cause heating within the one or more coated hair fibres by dielectric loss. Preferably, the hair dye composition used in step i) is a permanent or demi-permanent hair dye composition that may be prepared by combining a dye lotion containing one or more dye precursors and an activator solution containing an activating agent, wherein the activating agent in the activator solution converts the one or more dye precursors in the dye lotion to active dye agents.