Keep in mind that the color may fade, but this hair dye will permanently alter the color structure of your natural hair.

Will It Cause Damage?

The chemicals used in permanent hair dye, such as ammonia, are very strong and are usually left on your hair for an extended time. This makes it the most damaging hair dye.

Application, especially repeated application, will make the hair shafts significantly weaker over time. This can cause the hair to dry out, break, and lose its natural color.

It is vital to make sure you are using good products when permanently dying your hair and taking the necessary steps to keep it as healthy as possible.

Pros

• Long-lasting
• Wide range of shades to choose from
• 100% grey coverage
• Make the color look more natural

Cons

• It can be more damaging than other dyes
• It contains stronger chemicals than other dyes
• It cannot be washed out if you are not happy with the color

#2. Demi-Permanent Hair Dye

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Demi-permanent hair dye is the second longest-lasting hair dye on the market. It is very similar to permanent hair dye, but it is ammonia-free and contains a smaller amount of developer.

How Does Demi-Permanent Hair Dye Work?

Demi-permanent hair dye acts the same way as permanent hair dye by opening up the cuticles and delivering the dye into each strand of hair. The only difference is that the dye does not go as deep into the shaft.

Due to the smaller amounts of hydrogen peroxide, the color will not penetrate the hair as much as a permanent dye. These formulas will only lift or lighten your hair slightly.

How Long Does It Last?

This hair dye will last up to 28 washes. The less you wash your hair, the longer the color will hold. It also depends on how healthy your hair is before and after applying the hair color treatment. Know the procedure of removing demi-permanent hair dye properly.