abstract |
The present invention relates to a method of coloring porous material, which comprises contacting the material being colored, with a) a capped diazonium compound of formula (1) wherein A+ is a cationic radical of an organic compound, B is a radical of an unsubstituted or substituted, aliphatic or aromatic amine, An is an anion,and b) optionally a coupling component. Further, the present invention relates to novel compounds and compositions thereof. |