摘要:
A new blacking material can be produced by treating chitosan with the coloring matter of lithospermum root. In this treatment, a water-insoluble chitosan gives a particulate blacking material and a gel-form chitosan salt gives a gel-form blacking material, while a water-soluble chitosan, a chitosan oligosaccharide, D-glucosamine, or a salt thereof gives a liquid blacking material. A treatment of a powdery polymer with the blacking material gives a polymer-base blacking material and a treatment of a fiber with the blacking material gives a black fiber with low lightness.
摘要:
A process for producing a black colorant which comprises treating finely powdered amino sugar, protein or polyamide with a naphthoquinone derivative of general formula (1); a cosmetic containing a black colorant thus produced; and a process for coloring a base material with this colorant. In the said formula, R₁ represents hydrogen, hydroxy, halogen, α or β ; R₂ represents hydrogen or hydroxy; R₃ represents alkyl, alkenyl, or hydroxyalkyl: and n is 1 or 2.
摘要:
A process for producing a black colorant which comprises treating finely powdered amino sugar, protein or polyamide with a naphthoquinone derivative of general formula (1); a cosmetic containing a black colorant thus produced; and a process for coloring a base material with this colorant. In the said formula, R1 represents hydrogen, hydroxy, halogen, α or β; R2 represents hydrogen or hydroxy; R3 represents alkyl, alkenyl, or hydroxyalkyl; and n is 1 or 2.
摘要:
A new blacking material can be produced by treating chitosan with the coloring matter of lithospermum root. In this treatment, a water-insoluble chitosan gives a particulate blacking material and a gel-form chitosan salt gives a gel-form blacking material, while a water-soluble chitosan, a chitosan oligosaccharide, D-glucosamine, or a salt thereof gives a liquid blacking material. A treatment of a powdery polymer with the blacking material gives a polymer-base blacking material and a treatment of a fiber with the blacking material gives a black fiber with low lightness.