* Demi-permanent color works by depositing color onto the hair shaft, but it doesn't penetrate the hair cuticle like permanent color. This means it's less likely to cover grey hair completely, especially if you have a high percentage of grey.
* Demi-permanent color fades gradually over time, usually within 6-8 washes. This means you'll need to reapply it more frequently than permanent color, especially if you have stubborn grey hair.
However, there are some benefits to using demi-permanent color on grey hair:
* It can add shine and vibrancy to your hair, making grey strands less noticeable.
* It can help blend your grey hair in with your natural color, creating a more subtle effect.
* It's gentler on your hair than permanent color, as it doesn't contain ammonia or peroxide.
Overall, if you have a small amount of grey hair, demi-permanent color may be a good option for you. But if you have a lot of grey hair, or you want complete coverage, permanent color is a better choice.
Here are some additional tips for covering grey hair with demi-permanent color:
* Choose a color that is one or two shades lighter than your natural color. This will help to blend the grey hair in more easily.
* Apply the color to your grey hair first, and then to the rest of your hair. This will ensure that the grey hair is fully covered.
* Use a color that is specifically designed for grey hair. These colors are often formulated with more pigment to help cover grey hair effectively.
Remember to always test the color on a small strand of hair before applying it to your entire head. This will help to ensure that the color is the right shade for you and that you don't have any adverse reactions.