Effects of salt spray on light fastness of dyed fabrics

For searching the cause that leads to somewhat lower light fastness of dyed fabrics in coastal areas,the accelerated neutral salt spray test and acidy salt spray test were used to simulate a marine environment,and the accelerated exposure to sunlight experiment of dyed fabrics was performed,and the light fastness of the fabrics was tested and compared with the control samples,investigating effects of the marine environment on light fastness of dyed fabrics.The experimental results revealed that the salt spray had little influence on the shade of the dyes.However,it was observed that the light fastness of dyes with different structures was not alike in salt spray environment.Under the salt spray environment,the light fastness of the anthraquinone dyes was much lower than that under the normal atmospheric environment.But the salt spray test had less influence on the light fastness of azo dyes.