抄録
In order to establish the evaluation methods for the light stability of fur products, protein solubilities and amino acid compositions of dyed and un-dyed wool powders were examined after the irradiation of ultraviolet ray. The protein solubility of wool powders in M/20 sodium carbonate at 20°C for 2 h increased with irradiation time, corresponding to the protein deterioration caused by the irradiation. Such a deterioration was also evaluated with the decrease in the content of the half-cystine residue. Two parameters (protein solubility and the decrease in half-cystine) are considered to be adoptable as the indices of protein deterioration of dyed fur products under light irradiation.
