Rule 5: Don't Skip the Patch Test
It's important to test a new color on a small area of your hair before you apply it to your entire head — otherwise, you're asking for a mishap. "If the color you use is too ashy, say, your skin will look drab and old," says Saboski. You also risk a scalp reaction if your skin doesn't tolerate the dye chemicals.
To do a patch test, apply the dye on a small section of your hair, and see if the color is too light, dark, or ashy.
By: Daily Glow