15-20 minutes. but you can leave it on longer if desired bc it just deposits color and isn't damaging.
20 Min
redken color fusion (permanent)- 35 minutes redken shades eq (demi-permanent)- 25 minutes
I have dark hair but know hair pretty well. For example, my friend had blond hair and died it to brown. When you dye hair, the old color goes down to the end of your hair, so it will be lighter on the bottom. If you wash your hair the color will get lighter. If you dye your hair darker when it's light, your hair will be different shades and the dye usually doesn't stay in long. Also dying your hair that aggressively isn't healthy for your hair.
20 mins
Redken Shades EQ should be left on the hair for 20 minutes at room temp. If heat is added, leave on hair for 15 minutes.
It depends on what was previously put on your hair. Color cannot lift color, it would be best for you to go to a salon professional and let them do a complete consultation with you. It also depends on the brand of hair color that is being used, each brand has a specific time to to let the hair color process.
if you want to keep you hair color wash you hair with soap
same procedure as you would with long hair.
In general, the hardness of municipal water has little effect on the color of hair dye or on how long it lasts.
The color will fade slightly, but permanent hair color will stay in your hair until it grows out or you strip it.. Roughly 6-8 weeks depending.
20 mins on towel dried hair as per manufacturers instructions. I've left it on as long as 40 mins with no adverse results.
It depends. If it is permanent hair dye, then it last until you either recolour it or cut it. Assuming it is a darker color, then it will fade some over time and of course your new hair growth will come in your natural color. If it is temporary color, then it will last a few weeks depending on the color of dye and the color of your hair.