Naphtholactam dyes

A compound of the formula ##STR24## in which R.sup.1 is hydrogen, chloro, bromo, C.sub.1 to C.sub.4 alkyl, methoxy, ethoxy, nitro, phenylmercapto, or phenylmercapto substituted by chloro, methyl or methoxy,

• R.sup.2 is hydrogen or chloro,
• R.sup.3 is chloro, bromo, C.sub.1 -C.sub.4 -alkyl, methoxy, ethoxy, nitro, acetylamino, propionylamino, benzoylamino, methylsulfonylamino, ethylsulfonylamino, phenylsulfonylamino, tolylsulfonylamino, methylmercapto, ethylmercapto, phenylmercapto, phenylmercapto substituted by chloro, methyl or methoxy, napthylmercapto, phenylsulfonyl, phenylsulfonyl substituted by chloro or methyl, methylsulfonyl, ethylsulfonyl, N-mono-C.sub.1 - to C.sub.8 -alkyl-substituted sulfamoy, N,N-di-C.sub.1 - to C.sub.4 -alkyl-substituted sulfamoyl, N-phenylsulfamoyl, N-chloro-, -methyl-, -methoxy- or trifluoromethylphenylsulfamoyl, sulfopyrrolidide, sulfo-piperidide, sulfomorpholide, C.sub.2 - to C.sub.4 -alkanoyl, benzoyl or benzoyl substituted by chloro, bromo, methyl, ethyl, methoxy, or ethoxy,
• R.sup.4 is hydrogen, chloro, methoxy, ethoxy phenylmercapto, or phenylmercapto substituted by chloro, methyl or methoxy, or
• R.sup.3 and R.sup.4 together are ##STR25## R.sup.5 is hydrogen or chloro, methoxy or ethoxy, and R.sup.6 and R.sup.7 are independently C.sub.1 - to C.sub.8 -alkyl, C.sub.2 - to C.sub.8 -alkyl substituted by hydroxy, cyano, C.sub.1 - to C.sub.4 -alkoxy or C.sub.1 - to C.sub.4 -alkoxy-carbonyl, phenyl, or phenyl substituted by chloro, methyl or methoxy with the proviso that at least one of the substituents R.sup.1, R.sup.3 or R.sup.4 contains a sulfur atom.