Read the package. Every dye is different, and it will tell you in the instructions how long to leave it on.
There is no set time for how long Kool-Aid needs to sit in your hair to stay. The longer you leave it in, the more color will be deposited, but it will also depend on your hair type and how well it absorbs the color. It is recommended to leave it in for at least 30 minutes to an hour for a vibrant result.
If you already have dyed your hair a dark color you need to bleach it out, your hair should turn a blonde yellow color, then bleach it again. Then buy a white hair dye. Then leave that dye in your hair for a good 45 minutes. Then your done! I wouldn't suggest dying your hair again for a very long time because this can be very damaging. And this will work much better if your hair is its natural color.
hair color does not need to be kosher.
Why who change whose hair color? I need details.
Until your natural hair color starts showing back. You will probably need your roots touched up like every 4 weeks, and go back to get it highlighted like every 6 weeks or so, depending on your hair type.
When you bleach your hair, you are stripping all color pigment from your hair. You will need to wait for new hair to grow back for your hair to return to normal.
it just makes it shiny and thicker i think
Generally speaking, you do need to bleach your hair for blonde hair if you have a darker color.
If it is an ordinary conditioner then you only need to leave it in for 2 minutes but if you are using a treatment or leave in conditioner you should have it in for 10-15 minutes. Don't put conditioner on the roots as this is new hair. Put it on the middle length and ends of your hair.
you need to set the straightener to setting to where it wont burn you hair and dont leave the straighttner on your hair for a long time. also straighten medium strands not to thin not to thick .
You should leave olive oil in your hair for at least 1 hour but it does depend on what you are using the oil for. For example if you are using it for hair loss then you will need to leave it on for a considerably long amount of time,3 hours at the most but if it is for massaging then you should massage it in for about 15 minutes then wait 1-2 hours and then remove it. Hope this helps.
I am a hairstylist that specializes in haircolor. My best opinion is to go to a professional. To color gray hair you need the 3 primary colors that are missing to "fill" the hair (the remaining color in gray hair is missing you need to put those back in- if you don't you get color that fades, color that isn't true, etc) A warmer natural based color will do best.