Changes in Elemental Composition of Gray and Dark Brown Hair Treated with Permanent Hair Dye
January 2020
in “
대한미용학회지
”
TLDR Permanent hair dye reduces sulfur content in both gray and black-brown hair.
The study investigated the effects of permanent hair dyeing on the elemental compositions of gray and black-brown hairs using a scanning electron microscope and energy dispersive X-ray spectrometer. It was found that the permanent hair dye mixture contained elements such as carbon, oxygen, nitrogen, and sulfur. Before dyeing, gray hair had a lower sulfur content (3.32%) compared to black-brown hair (4.40%). After dyeing, the sulfur content decreased in both types of hair. The study also observed the formation of spongy-type holes on the surface of the hair dye mixture.
