Method for stripping dyes on dyed silk fabrics

The invention relates to a method for stripping dyes on silk fabrics. The method comprises the following steps: preparing a transition solution A from dimethyl sulfoxide and methanol according to the volume ratio of 1:1, and preparing a transition solution B from methanol and ultrapure water according to the volume ratio of 65:35; preparing different extracting solutions according to different dyes by using 37% concentrated hydrochloric acid: mixing with methanol to prepare an amur cork-tree extracting solution, mixing with the solution A to prepare an indigo blue extracting solution, mixing with the solution B to prepare a Sappanwood extracting solution, mixing with dimethyl sulfoxide to prepare a madder extracting solution and mixing with the methanol to prepare a sophora flower bud extracting solution, wherein the mass percent of HCl in each extracting solution is 0.185-0.74 percent; and filling nitrogen, sealing, pressurizing, and stripping the dyed silk fabrics by adopting a proper heating method. According to the method disclosed by the invention, the stripping efficiency of the silk fabric dyes is effectively improved, analysis and identification of the silk fabric dyes are promoted, and the method can be applied to stripping the silk fabric dyes of different aging degrees.