keratin-containing fiber to the at least one sulfide dye of formula (1), their salts, isomers , which includes baggage and cargo handling or other solvents, keratin-containing fibers has been described a method of dyeing:(1)from expression,R 1 , R 2 , R 3 and R 4 is independently hydrogen C 1 -C 20 alkyl C 1 -C 20 alkyl C 3 -C 6 cyclo-alkyl Halogen NO 2 OH SH Or formula (1a)(1a)of the radicalR 5 is hydrogen Or C 1 -C 20 alkylR 6 , R 7 and R 8 are each independently hydrogen, C 1 -C 20 alkyl, C 4 -C 12 cycloalkyl, C 6 -C 13 are alkyl Phenyl -C 1 -C 5 alkyl Or R 6 and R 7 is connected to the nitrogen atom and one that can be combined division (interrupted) by an -O- or -NH- more than C 4 -C 12 - membered heterocyclic ringY 1 is C 1 -C 10 alkylene C 5 -C 10 cycloalkylene C 5 -C 10 arylene Or C 5 -C 10 arylene - (C 1 -C 10 alkylene), andT 1 is the formula (1b)(1b) radicalsOr -O- (X 3 ) s andQ 1 is saturated, aromatic or heteroaromatic group of cationic radicals (biradical), or Or formula (1c)(1c)of the radicalZ 1 is -C (O) - - (CH 2 CH 2 -O) 1-5 - -C (O) O- -OCO- CON (R 9 ) - -X 4 -CON (R 9 ) - - (R 9 ) NC (O) - -O- -S- -S (O) - Or -S (O) 2 - aR 9 , R 10 and R 11 are each independently hydrogen C 1 -C 14 alkyl C 2 -C 14 alkenyl C 6 -C 10 Oh reel C 6 -C 10 aryl -C 1 -C 10 alkyl Or C 1 -C 10 alkyl (C 5 -C 10 aryl)X 1 , X 2 , X 3 and X 4 are independently from each other C 1 -C 18 alkylene - (CO) -C 1 -C 18 alkylene C 1 -C 18 arylene C 6 -C 18 arylene -C 1 -C 12 alkylene Or - (OCH 2 CH 2 ) n -O-, andn is a number of 1 to 5p, r, s, t and u are independently of each other 0 or 1m is 1 Or 2If U is m = 1, hydrogen AnotherU is If m is 2, a bond.wherein the compound is an organic material, such as keratin fibers, preferably human hair, is useful for dyeing.This dye is characterized by deep dyeing having good fastnes
