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PROCESS FOR PRODUCING MELANIN, MELANIN PRODUCED BY THE PROCESS, FUNCTIONAL FILM CONTAINING THE MELANIN, AND PROCESS FOR PRODUCING THE SAME
PROCESS FOR PRODUCING MELANIN, MELANIN PRODUCED BY THE PROCESS, FUNCTIONAL FILM CONTAINING THE MELANIN, AND PROCESS FOR PRODUCING THE SAME
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机译：生产黑色素的过程，由该过程生产的黑色素，包含黑色素的功能膜以及生产相同黑色素的过程
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摘要
The present invention provides a melanin that is excellent in coloring a functional film, and in reproducibility and stability during storage, and a method for its production. Also, the invention provides a functional film containing a melanin and its method for production. Specifically, it provides a functional film containing a melanin of which the alteration is improved and which is excellent in the property for protecting eyes from ultraviolet rays, and in its method for production.;The method for producing a melanin of the present invention, comprises, at least, under controlled conditions, a step for an oxidative reaction wherein a melanin precursor is continuously oxidized while the mole ratio of the melanin precursor relative to the oxidative agent is maintained at a constant ratio, and a step for precipitation wherein a melanin is precipitated by acidifying a reaction solution after the step for an oxidative reaction.
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