Dry your hair immediately after coloring and examine the tone under natural lighting. Ashy color often appears most prominently on previously bleached or highlighted areas of hair or on the ends of hair which have been subjected to repeated color treatments.
If you color your hair and use dyes in the blond or brown color family, you may experience an ashy or greenish-colored hair tone after completing the color job. This may result from coloring your hair more frequently than recommended by the hair color product manufacturer or from exposing your hair to chlorine and not rinsing it well. While some beauty supply stores sell products specifically designed to remove ash tones from recently colored hair, there are some inexpensive ways to fix the problem yourself.
Mix a new box of red color toner or red hair color in a shade family similar to the color you originally used to dye your hair. Most hair color products are labeled with a color shade and a number. For best results, use the same brand and the same number in the red hue as you used for the original job. For example, if you originally used light brown 8 to color your hair, use light auburn 8 to correct the ash tone.
Mix the toner or color according to the product directions. Pour half of the mixed solution into a plastic bowl and add 1 ounce of your choice of shampoo to the mix. Blend well with a gloved hand.
Apply the mixture to your hair much like you would apply shampoo. Work it through to the ends and leave on for one minute. Rinse, dry and examine the results. If the ashy tone is still present, repeat the process.
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