Simba44
Well-Known Member
I think it's actually the acidity, red in ketchup would just mask the green but the effect wouldn't last if it was rinsed off as it's not dying the hair. . .A quick google reveals it's not the chlorine but a build up of copper in the pool that causes the green tinge and therefore a shampoo with ions to attract away the copper is going to be most effective. Think of green copper stains on taps.
http://www.hairfinder.com/hair4/pool-green-hair.htm
ethylenediamene tetracetic acid is the ingredient you should be looking for.
http://science.jrank.org/pages/2588/Ethylenediaminetetra-Acetic-Acid.html
Yes ketchup is full of acid from the vinegar that helps it all stick together