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What is sunscreen made out of…..BLACK PEOPLE? 😳
THE EXTRACTION OF MELANIN FROM
SKIN WITH DILUTE ALKALI.
It has generally been assumed that the black pigments (melanins) which occur
normally or pathologically in animal tissues, hair, skin, feathers, eto. are
chemically very inert substances, and in most cases their isolation has been
carried out by dissolving the tissue in boiling alkalies or strong acids. Thus prepared melanins from both the skin and hair of a
negro by heating the material at 100° either with 5-6 % potassium hydroxide
or with concentrated hydrochloric acid until all the keratin had dissolved.
Other investigators have used even more drastic methods such as boiling with
more concentrated alkalis or even fuming hydrochloric acid.
By WILLIAM JOHN YOUNG
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