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Uso de derivados pirrolicos de la 1,4-naftoquinona y del 1,4-dihidroxinaftaleno en el teñido de las materias queratinicas, nuevos compuestos y composiciones que los contienen.
Misturas de corante preto de corantes azo reativos à fibra, processos para a preparação dos mesmos e uso dos mesmos para corar material fibroso contendo hidróxi e/ou carboxiamido
Misturas de corantes pretas de corantes azo reativos com relação à fibra e sua aplicação para tingir material de fibra contendo grupos hidróxi e/ou carbonamida.