(Have had to put this as a reply as I can't post all the pics in one post)
And now for the results of the henna and indigo. It's a two step process, first you mix the henna (which needs to be an acidic mix, so I mixed it with vinegar and added a bit of olive oil to make it easier to wash out). Then you have to let the mix sit in the bowl for 6-8 hours for the dye release. Then put the gloop onto your hair, cover, and leave for 4-6 hours (or longer - some people leave it on overnight). Then rinse out. Then you mix the indigo using water instead of acidic liquid. I also added an egg for a conditioning/protein hit at the same time, and again a little olive oil to make it easier to wash out. This part doesn't need to sit for dye release, just put it straight onto your hair, and let it sit for as long as possible. I left it on overnight, but still didn't achieve black. I am actually quite surprised that the henna seems to have actually lightened my hair (which henna shouldn't do), but the end result is only slightly darker than the henna result. The first two pics are just after the henna (hair is wet, so it'd be a little brighter red when dry), then the next two are the results after the indigo. Disappointing isn't the word for it. The indigo just made it go a slightly browner shade of red! The roots are darker than the ends, but still not black. Oh well, back to the box dyes it is then!