Previously when I bleached part of my hair I used a Manic Panic Flash Lightening Kit because it was what was available where I got my Manic Panic hair dye. I was never that fond of the MP bleach kits and I had a hard time lightening my hair with it. Since I had nothing left of it I decided to hunt for something better to do my roots with and touch up the parts of my hair that were still rather dark...
I turned to Sally Beauty this time and picked up two products from Ion, Color Brilliance Powdered Lightener and Color Brilliance 30 Vol Sensitive Scalp Developer in the giant sizes since they were on sale for like $5 a piece. I also got a giant bottle of the Ion Color Defense conditioner, which is a bit silicone-y but does seem to make my hair dye bleed a lot less.
The Ion Color Brilliance bleach and developer work so so so so much better on my hair than the Manic Panic bleach. Instead of being a slightly green light brown after a freaking hour my hair is golden after 30 minutes, roots are platinum in 15 minutes. Ion Color Brilliance makes my root touch ups much less daunting since I am able to be done in about 10 minutes.
These products are safe for on scalp use, but it's still bleach and 30 vol developer and this needs to be done carefully. I try to keep it off my scalp as best as possible because chemical burns are no joke. So far I have done 4 root treatments and I have not had any redness, flaking, weeping, burning, tingling or any other issues. My hair doesn't feel gummy or fried directly after rinsing but it is noticeably dry, this is to be expected with bleach though. After I finish with conditioning Manic Panic dye my bleached hair feels about the same as the virgin hair at the nape of my neck (this hair doesn't get dyed, teased or straightened).
Over all, I can't recommend this stuff enough. My hair typically resists lightening but the Ion products do the job and don't leave me with muddy and patchy results. I widened the red-orange section of my hair and didn't get any greenish or brassy bits down the length of my hair, it was such a pretty bright golden color I almost didn't want to dye over it.