Abstract: A spray head (1) with a nozzle insert (2) for atomizing a fluid, which tends to gum up or harden, from a reservoir, wherein the nozzle insert (2) is substantially designed as a hollow cylinder (3) that is open on one side and has, on the other side, a nozzle opening (4) towards the outside, and the nozzle insert (2) is connected to a nozzle insert receptacle (5), which has a channel (6) for the fluid, wherein the channel (6) corresponds to the nozzle opening (4). The nozzle insert (2) consists of an elastic material (7) and, in this manner, is connected to the nozzle insert receptacle (5) so that an external, free section (8) of the nozzle insert (2) along with the nozzle opening (4) is at least partially manually compressible and/or is designed to be manually bendable from its standby position (R), whereby hardened resin residue (12) can be removed from the nozzle opening (4).

Abstract: The present invention relates to an oxidizing composition for treatment of keratin fibers comprising a combination of; (a) at least one anionic associative copolymer, (b) at least one anionic non associative copolymer; (c) at least one peroxide agent; (d) at least one persulfate agent; (e) at least on alkalizing agent; and (f) a carrier medium suitable for hair treatment. The oxidizing composition described is suitable for composition used in conventional hair treatments such as dyeing, bleaching, and permanent waving or relaxing/straightening of the keratinous fibers, particularly human hair, requiring an oxidizing composition.

Abstract: A method for measuring the surface smoothness of hair comprising the steps of: a) providing a means for measuring hair surface smoothness; b) using said means for measuring hair a surface smoothness to obtain a measured surface smoothness value for said hair; and c) correlating said surface smoothness value to a surface smoothness descriptors.