PROCEDIMIENTO PARA MEJORAR LA SOLIDEZ FRENTE A LA LUZ DE CUEROS TENIDOS

摘要

Process for improving the light fastness of conventionally anionically dyed leathers by treating the leathers with copper salts before, during or after dyeing. This process makes it possible to prepare dyeings of increased light fastness starting from inexpensive anionic leather dyes which of themselves possess only moderate light fastness.