Does demi lift or lighten color?

What does the CLEAR shade do? Can I use it on color-treated hair? On natural hair?

How do I determine whether I should use a demi or permanent color?

Does demi cover gray 100%?

What developer do I use? What happens if I don’t use the dedicated developer?

Do the demi shades match the permanent shades?

When do I use a demi permanent vs permanent color?

What is the difference between a demi and permanent color?

How long does a demi permanent last?