| abstract |
PURPOSE:To obtain the titled cosmetic having excellent color, feeling and durability, etc., by dyeing specific modified porous silk fibroin powder with an acid dye, and using the dyed powder as a color pigment. CONSTITUTION:The objective cosmetic is colored with a color pigment produced by dyeing modified porous silk fibroin powder with an acid dye. The modified porous silk fibroin powder contains >=300mul/g of pores having pore diameter of <=1mu and is composed of a regenerated silk fibroin attached with a polymer composed mainly of N,N-dialkylaminoethyl methacrylate (preferably N,N- dimethylaminoethyl methacrylate or N,N-diethylaminoethyl methacrylate) wherein at least 50wt% of said silk fibroin is composed of a beta-type fibroin insoluble in hot water. |