Dyeing of keratin fibres with indolines using metal salts as catalysts

An oxidation dye composition for keratin fibers consisting of component A and component B wherein component A is an oxidation dye precursor indoline derivative of the formula I:

• ##STR3## wherein each of R.sup.1, R.sup.2, R.sup.3 is hydrogen or an alkyl group having from 1 to 4 carbon atoms;
• each of R.sup.4 and R.sup.5 is hydrogen or an alkyl group having from 1 to 4 carbon atoms or together with the oxygen atom to which they are attached represent an alkylenedioxy group containing 1 to 4 carbon atoms;
• or a salt thereof;
• and wherein component B is a metal salt having a non-oxidizing anion selected from the group consisting of a lithium, magnesium, calcium, aluminum and a zinc salt, said component A being present is an amount of from about 0.1 to about 30 mmoles per 100 g of said composition and said component B being present in an amount of from about 0.1 to about 50 mmoles per 100 g of said composition, wherein color development of said composition takes place by oxidation with atmospheric oxygen in the absence of additional oxidizing agents.