Scientists have discovered that an ancient method used to darken hair, dating back more than 4,000 years, is based on a chemical process that takes place at the nanoscale. Oct 2, 2006 A 2000-year-old recipe for hair dye shows Ancient Greeks and Romans used nanotechnology to permanently colour grey hair black, say experts. Hair coloring is as old as human civilization. Lead 2. . .

Ancient hair dye methods

Oct 2, 2006 A 2000-year-old recipe for hair dye shows Ancient Greeks and Romans used nanotechnology to permanently colour grey hair black, say experts.

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Both boys and girls also shaved their heads, except for a small braid worn on the side.

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In ancient times, the dyes were obtained from plants. Most wore wigs, but some used a mixture made from the ashes of burned plants or nuts to achieve the hue. Here, we study a hair-dyeing recipe using lead salts described in text since Greco-Roman times. .

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It was believed that the darkness of the animal was transferred to the hair. Many Romans preferred a black dye that consisted of leeks and boiled walnuts, while Saxons added such unlikely colors as orange, green, and blue to their hair and beards. PPD is still the basis for most of the haircolor formulas used today, more than 150 years later.

Dr Philippe Walter of the French state museum agency&39;s.