Oxidation hair dyes based upon tetraaminopyrimidine developers

An aqueous preparation for the dyeing of hair consisting essentially of (1) from 0.2% to 5% by weight of an oxidation dyestuff combination of a developer component, and a coupling component in substantially equimolar amounts, said developer component consisting essentially of (A) a tetraaminopyrimidine of the formula ##STR12## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are each selected from the group consisting of hydrogen, phenyl, alkyl having 1 to 4 carbon atoms, phenylalkyl having 7 to 10 carbon atoms, phenylalkenyl having 7 to 10 carbon atoms,

• X--(CH.sub.2).sub.n --
• wherein n is an integer from 1 to 4, and X is selected from the group consisting of hydroxyl, halogen and NR.sub.7 R.sub.8 -- in which R.sub.7 and R.sub.8 are selected from the group consisting of hydrogen and alkyl having 1 to 4 carbon atoms, and together with the nitrogen atom R.sub.7 to R.sub.8 form a 5 to 6 membered heterocyclic ring optionally containing an additional nitrogen atom or an oxygen atom,
• and wherein R.sub.1 and R.sub.2 or R.sub.3 and R.sub.4 or R.sub.5 and R.sub.6, together with the nitrogen atom form a 5 to 6 membered heterocyclic ring, optionally containing another nitrogen or oxygen atom in the ring or (B) a water-soluble acid addition salt of (A);
• (2) from 0% to 5% by weight of a direct dyestuff;
• (3) from 0% to 30% by weight of a surfactant;
• (4) from 0% to 25% by weight of a thickener;
• and (5) the balance up to 100% by weight of water.