Linen cannot cover gray hair, it can only hide it.

Maroon needs to cover 90% of gray hair, and it can only be covered well at 4-5 degrees. I don’t know what color your swatch is

Formula 1: 5/4/6% hydrogen peroxide milk ratio 1:1:2

Formula 2: 5 degree maroon + 5/0 + red tool color + 6% hydrogen peroxide milk ratio 10:2:1:13

Operation method: Use formula 1 to base first, then rinse with water and blow dry. Application formula 2

Note: Red is the color with the strongest adhesion. Maroon also contains red pigment, so it does not affect the coloring effect

The above answers are generally used by large stores

The approach of small shops is: add 3/0 to maroon and apply it directly, which leads to the problem that the color is uncontrollable