✔ 最佳答案
If you can read English, I can teach you. Firstly, I was beauty school teacher, I am licensed hair stylist in US both in California and North Carolina. I had beauty saloon. OK! I am more than qualify to teach anyone in coloring hair.
1. In US, we need to have license to buy professional coloring and special training to color someone hair.
2. Professional Coloring hair need to study. It is not so simple like you say 自己染頭髮.
3. I hope your color is not a permanent one. For permanent color that has been color too dark, you cannot go lighter without bleach. You cannot bleach your hair without going to a qualified colorist. Besides, the hair has to be treated before second process otherwise, the hair will break. Or you can mess up the color and you may look strange. We need to understand color chart and color tone.
I color my hair every month but I use the same color so my hair always the same. Besides, I use very good shampoo and conditioners and mender.
In your situation, if you go to Watsons or Manning to buy those Carol or whatever color, they are called semi-permanent (professionally speaking). Once you wash your hair more often, the color will fade in 4-6 weeks. This color will not damage your hair.
Human hair normally grow 1/2 inch each month. So you may have to wait.
You can still put new color to your hair. If you do so, you will see two color in the hair. (you will not see indoor but once in the sun, it is very obvious)
Yes, some people may be 敏感, that is why manufacturer ask you to take a test on your skin (read those instructions) before you apply on your hair or your scalp.
OK! I almost give a lesson here.
