quick indigo question? how long do you leave indigo on?

[BellaMarie]

www.mehandi.com has a page that tells what mixing henna and indigo should give you. It's under the section about using henna for brunette hair colors.

http://www.mehandi.com/shop/brunette/brunette.pdf

Thanks but i got that color chart when i first started to henna lol. But i thought maybe theres a way to squeeze some black color out of the process. Ive looked on LHC too and got no new information. I dont want to experiment cause its expensive lol.