* Hair type: Porous hair (damaged, dry) will hold color less than healthy, smooth hair.
* Original hair color: Demi-permanent color is more noticeable on lighter hair and fades faster on darker hair.
* Brand and formula: Different brands and formulas have varying staying power.
* Washing frequency and water temperature: Hot water and frequent washing fade color faster.
* Product usage: Using color-safe shampoos and conditioners helps preserve the color.
However, here are some general guidelines:
* Demi-permanent hair color typically lasts for 4 to 6 weeks.
* It fades gradually, meaning it'll be less vibrant with each wash.
* It does not contain ammonia or peroxide, so it doesn't lift or lighten your natural hair color.
To make your demi-permanent color last longer:
* Use color-safe shampoos and conditioners.
* Wash your hair less frequently.
* Use cool or lukewarm water when washing.
* Avoid using heat styling tools as much as possible.
If you want more specific information, it's best to consult a stylist or check the product instructions for the specific demi-permanent hair color you are using.