In the summer when I go to the beach, my hair
gets a lot lighter. What is it that causes it to
go that? Is it the sun, saltwater, or both?
I did some web search and here is what I
found:Sunlight damages hair just like it damages
skin and the lighter the hair the easier it gets
damaged. This is a photochemical damage to the
hair shaft that breaks down the sulfur bonds and
the hair becomes fragile. The hair pigments that
are vulnerable to chemical modification by this
photobleaching process lose color. Rearrangements
in the pigments molecular structure changes the
way light is absorbed and reflected. A similar
effect can be caused by chemical bleaching by the
hair stylist or from chlorine in a swimming pool
by a process called chemical bleaching.