14 citations
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September 1954 in “Textile Research Journal” Hair absorbs different substances from solutions based on pH levels.
13 citations
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January 1995 in “Journal of the American Institute for Conservation” Researchers developed a less damaging way to extract red dyes from wool using EDTA and DMF, preserving the fiber's strength for further analysis.
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January 1995 in “Journal of the American Institute for Conservation” A new method extracts red dyes from wool without damaging it, although it slightly weakens the wool.
63 citations
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February 2017 in “ACS biomaterials science & engineering” Polydopamine is a safe, effective, and permanent hair dye that turns gray hair black in one hour.
1 citations
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April 2018 in “PubMed” The medulla in Asian scalp hair has a tubular structure that allows ions and large molecules to flow through it.