Spray Color Filler Technique
Use a spray color filler before any color job that might result in a color stain or grab. If your hair is blond and you're going dark, you need to protect your hair before putting the color on it. Use this technique whenever you are going darker by more than four shades and whenever funky color bases such as green, blue and violet are involved.
Spray the color filler on clean, dry hair. You can't spray on too much, so be sure to douse it well. Pay particular attention to the ends, and lift up that hair to make sure you get it all.
Let the filler air dry before applying color. Apply color directly over the filler.
Hair Color Technique
Coat the hair with a bottle of color pigment to fill hair that might fade quickly to an unwanted color. Red colors are very prone to fading to orange or pink when placed on blond hair. Other colors that might fade quickly include warm medium browns, golden blonds, strawberry blonds and other neutral and warm colors.
Pick up an extra bottle of whatever color you are using. Do not add color developer to the color. Dump the color into a color bottle and squirt it on your hair.
Put on a pair of gloves and massage the color into your hair. Pay special attention to those ends! They are always the first to fade.
Apply color mixed with color developer directly on top of the color-only application. Process as usual.