Process for the dyeing and printing of paper materials in different hues using a single coupling component

A process for dyeing or printing paper in different hues, using a single coupling component, comprising the steps of

• (1) Applying to the paper a single coupling component selected from the group consisting of ##STR57## wherein R.sub.1 is hydrogen, an alkyl group, an acylaminoalkyl group, an aralkyl group, an aryl radical, a heterocyclic radical, an alkylene radical which links the radical of the elected formula with a further similar heterocyclic radical, or an amino group;
• R.sub.2 is hydrogen, an alkyl group, cyclohexyl, cyano nitro, nitroso, H.sub.2 N-, acylamino group, an alkyl carbonyl or arylcarbonyl group, a sulphonyl group, an aminosulphonyl group, an alkoxycarbonyl or aryloxycarbonyl group, an aminocarbonyl group, a halogen atom, a sulphoalkyl group, a haloalkanoylaminomethyl group, a quaternary ammoniumalkanoylaminomethyl group, a sulfoalkanoylaminomethyl group, a phthalimidomethyl group, an o-benzene disulfonimidomethyl group, a sulfonic acid group, a carboxyl group, a quaternized amino group, a pyridinium group or benzimidazolium group;
• R.sub.3 is hydrogen, an alkyl group, an aralkyl radical, an aryl radical, a heterocyclic radical, cyano, an alkoxycarbonyl or aryloxycarbonyl group, an aminocarbonyl group, an alkoxycarbonylmethyl or aryloxycarbonylmethyl group, cyanomethyl, an acylmethyl group, aminocarbonylmethyl, carboxy or hydroxymethyl;
• n is 2 or 3;
• x is hydroxy or amino;
• and
• Y is hydrogen or halogen;
• (2) Applying to one area of the paper a first diazo compound to give one hue in the area where the coupling component and the first diazo compound are applied;
• and
• (3) Applying to a second area of the paper a second diazo compound to give a second hue in the area where the coupling component and the second diazo compound are applied.