Terrible ammonia smell when mixed!
When I mixed this lightener with the developer (of different brand) the ammonia smell was so bad my eyes were burning and I was coughing, which caused me to have to pause the application process 1/4 of the way through and find a shirt to tie around my nose and mouth so I could breathe... That didn't help. I had to hold my breath and keep walking around my house so I wouldn't breathe it in from standing in one place. All that stopping and walking interfered with my lifting process.😡<br />No window in that particular bathroom I was in. But I think a window wouldn't have helped, I probably needed to be outdoors period. Terrible experience.  Left on somewhere between  40-55 mins, Some places were only slightly darker (from all my stopping). Lifted well though. 3 stars.
Rating: 3 stars