Patent Interference No. 103,548
in which R represents a hydrogen atom or a C1-C4 alkyl group, or an acid
addition salt thereof, and a second component consisting of a composition (B)
which contains, in a medium appropriate for dyeing, either:
(a) hydrogen peroxide at a pH of between 2 and 12 when the composition
(A) contains iodide ions, or
(b) iodide ions at a pH of between 3 and 11, when the composition (A)
contains hydrogen peroxide.
23. A multicompartment device or "dyeing kit", comprising different
compartments containing different components of the dyeing agent defined in
claim 22.
24. A composition according to claim 1, wherein the salt is the
hydrochloride or hydrobromide.
25. A composition according to claim 1, wherein 5,6-dihydroxyindoline is [5,6-
dihydroxyindoline, 5,6-dihydroxyindoline hydrochloride, 5,6-dihydroxyindoline
hydrobromide,] N-ethyl-5,6-dihydroxyindoline, [N-methyl-5,6-dihydroxyindoline] or
N-butyl-5,6-dihydroxyindoline.
26. A method according to claim 21, wherein the hydrogen peroxide
content in the composition is between 2 and 10 volumes.
[27. A tinctorial composition according to claim 1, wherein the
5,6-dihydroxyindoline is 5,6-dihydroxyindoline hydrochloride, an
N-(C2-C4)alkyl-5,6-dihydroxyindoline or a salt of the latter.]
[28. New compound consisting of 5,6-dihydroxyindoline hydrobromide.]
29. New compounds consisting of N-(C2-C4)alkyl-5,6-dihydroxyindolines and their
salts.
30. A tinctorial composition useful for dyeing keratinous fibres, in particular
human keratinous fibers, comprising from 0.01 to 8% by weight, relative to the
total weight of the composition, of at least one 5,6-dihydroxyindoline
corresponding to the formula (I):
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Last modified: November 3, 2007