Dyestuffs for wood that can be diluted in organic solvents. They allow to colour any type of wood essence in a homogeneous way, also suitable for staining transparent nitro, polyurethane, acrylic, synthetic varnishes of primers or finishes. In some cases, with this type of colourant, slight differences in colour shades of other wood stains of any other brand are corrected. The characteristics of the solvent may slightly alter the shade of the dye. In addition to the standard stains listed, it is possible to produce ready-to-use stains or sample concentrates.