Here's why:
* Permanent hair color is already neutralized. The color molecules bind to the hair shaft, and the developer used to lift the natural pigment has already been neutralized during the coloring process.
* Neutralizing shampoos are for temporary color: These shampoos are designed to remove temporary color from the hair, such as hair chalks, toners, or semi-permanent dyes.
* Regular shampoo is enough: After you color your hair, you should use a gentle shampoo that's formulated for color-treated hair. This will help to prevent fading and keep your hair looking its best.
However, there are some exceptions:
* If you experience an allergic reaction: If you have a reaction to the color, you should immediately consult a doctor or dermatologist. They might recommend a specific shampoo to help alleviate the reaction.
* If you want to adjust the tone: If you want to adjust the tone of your hair color (for example, make it a bit cooler or warmer), you might use a toner or gloss after coloring. In this case, you might use a neutralizing shampoo to remove any excess toner.
In summary: You don't need a neutralizing shampoo specifically for permanent hair color. However, if you have an allergic reaction or want to adjust the tone of your color, you might consider using one. Always consult with a professional hairstylist for advice tailored to your specific hair needs.