A hair dye composition comprising a primary intermediate, a coupler and oxidant and water wherein the primary intermediate is a compound of the formula I or II ##STR1## with the proviso that when the primary intermediate has the formula II, the coupler has the formula III ##STR2##

Una composizione nella tintura dei capelli che contiene un intermediario primario, un accoppiatore e un ossidante ed acqua in cui l'intermediario primario รจ un residuo delle formule I o II ## del ## STR1 a condizione che quando l'intermediario primario ha la formula II, l'accoppiatore ha il ## del ## STR2 di formula III

 
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> Methods for making polymers from N-vinyl acetamide monomer

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