| abstract |
(57) [Abstract] An ultraviolet-cutting agent that absorbs ultraviolet rays and suppresses wrinkles, spots, freckles, skin roughness, or damage to hair due to its stimulation can be easily produced. Antioxidant, A cosmetic having excellent film forming ability, moisturizing property and safety is obtained. SOLUTION: The method for producing an ultraviolet ray blocking agent is a mixture of a keratin raw material and a peracetic acid solution at 40 to 60 ° C for 30 minutes to 5 minutes. The first hydrolysis step of heating for time to hydrolyze keratin, the diluting step of diluting the liquid by adding and mixing water to the liquid in which the keratin is hydrolyzed, and the diluted liquid A second hydrolysis step of obtaining a hydrolyzed keratin protein by further heating the keratin for 30 minutes to 5 hours at 100 ° C. to further hydrolyze the keratin. |