My first time trying eyebrow tinting and wasn't sure if it would work for me as I'm Chinese with dark hair. I asked the therapist about it and she explained a bit and told me it would last at least a week. The results were pretty good afterwards but when I went home and washed my face, you couldn't tell I had anything done, it all washed off! Someone told me afterwards that it also depends on what was used. Had I known I would rather pay more for something that lasts more than a few hours