Before I go further, let me just apologize for the way I look below. Terrible. Terrible skin too, sorry about that- I couldn't be bothered with the retouch tool.
I decided to bleach my hair blonde again - I love having it and missed it, but the health of my hair prohibited me from doing it again. BUT, it's back. So, how did I do it? Well.
I already had lightened ends, so I started by bleaching all my hair up to that point (so no bleach on the ends). I used a blue powder bleach with 20vol developer for all this by the way. After 1 bleach, my hair was orange. I'd expected this, but it was still quite a shock. I quite liked it though!
I then bleached my whole head (apart from the shaved bits - I left those bits dark), for about 30 minutes.
By this point, my hair was pretty light (the roots were basically white), but there were still a few bits of orange/yellow. I got rid of these by doing a further 2 'selective' bleaches on just those bits, for no longer than 30 minutes each time. If i had been using a stronger developer I wouldn't have needed to do this (or if I had, my hair would have melted by now), but I prefer using weaker stuff so I have more control over the end result.
Now it was pretty light, so ready for the toner. I used L'oreal Luocolor P01, with 20vol developer, for 15 minutes, which whacked out alot of the yellow and left it a nice ashy platinum!
I missed this hair colour. :')
My hair's totally fried now btw - lots of protein treatments are in order!