First double chloramines and formaldehyde condensation body, the fixing agent solution is Y, to a cationic nature, with direct dyes, acid dyes, anionic dyes decahydrate form insoluble color lake, forming the fiber surface so as to achieve the solid color purposes. However, because the light fastness can affect, the toner is added in the solid metal (eg copper), can improve the light fastness, such as the fixing agent M is a resin-based fixative copper complexes. But because copper can be peeled off from the fiber sweat solution, easily lead to the heavy metal content on the fabric, another drawback is that the fabric containing fixative release of free formaldehyde, and often can not be reduced to an amount of the permissible range inside. So now with some more environmentally friendly without formaldehyde or low-formaldehyde fixing agent.