Approximately 2 years if the container is tightly sealed and stored in a cool, dry place and away from light.
I would say it depends on your hair type and what kind of developer you used
Will heat destroy hair developer
Yes, cream peroxide is developer.
Read the directions on the bottle. Every brand is different.
The colour will not take, you need the developer to activate the colour. I disagree. I died my hair today with Feria Intense Auburn without any developer, and it is bright red and looks great. I have long hair, so I don't use the developer bottle and replace it with an equal amount of conditioner and leave it in longer. It will fade quicker, but won't damage my hair.
No. It is not recommended to use hair dye without the developer or without it's original content. However if you were to use a temporary rinse then a developer isn't needed. If you are using any dyes that are not already ready to go (previously mixed by the manufacturer) then you will need to follow those instructions and mix your developer with the color.
one ounce hair color, 2 ounces developer. OR 2 ounces hair color, 4 ounces developer
20 Volume developer should be used when toning hair.
What happens if you use to much hair developer to hair dye
A creme developer is used on the hair to help lift and tone the color. The developer will speed up the lightening process of the hair and is typically used when bleaching or highlighting the hair.
No, it lifts your natural hair color by use of the developer. The higher the volume of the developer the more lift you will get in your hair.
When used alone, developer will do nothing to the hair. It is made to be mixed with a hair color.