Abstract: Cosmetic sunscreen products which contain a tyrosine derivative of the formula: ##STR1## in which R.sub.1 is H or CH.sub.3 --(CH.sub.2).sub.x, with X being 1 to 20, and R.sub.2 is CH.sub.3 CO-- or CH.sub.3 --(CH.sub.2).sub.y --CO, with Y being 1 to 20, provide a long lasting and dark, natural tan after a short exposure to sunlight. The sunscreen product may contain an activator which is an alkali metal or alkaline earth metal salt of adenosine-5'-tri-, di-, or monophosphoric acid and mixtures thereof with an alkali metal or alkaline earth metal hydrogen phosphate.

Abstract: Cosmetic compositions and processes for face and body comprising a cosmetologically effective amount of a compound of the formula ##STR1## wherein R is selected from the group consisting of C.sub.1 -C.sub.4 alkyl and C.sub.1 -C.sub.4 acyl; anda cosmetologically acceptable carrier. The compositions and processes are useful in smoothing of wrinkles, normalization of skin fat and increase in moisture retaining capacity of the skin.

Abstract: Method of increasing the surface tension or specific surface energy of normally solid substrates by contacting same with a compound or compounds of certain metals selected from the IVth Group of the Periodic Table, in order to render the substrates permanently wettable to fluids.

Abstract: A device for determining the degree of skin sensitivity on the basis of the persistance of a streak. At least one element is provided which is to be compressed against the action of an elastic system or a spring. The outer end of this pressure element is provided with a surface which is contacted with the skin to enable a standardized pressure to be applied thereto.