Professional product wise, permanent hair color can either make the hair feel thicker or thinner depending on level. The higher the level themore expanded the cuticle. Lighteners or bleach will expand the hair or technically swell the cuticle layers making the hair feel thicker. Keep in mind the higher the ammonia content in the product the more damage can be done.
Hair dye can be messy and stain things other than your hair. Some people are allergic to it.
Describe the physical effects of styling techniques on the hair structure?
it dyes your skin Orange or red and it depend on what type henna it usually turns your hair brown or indigo
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Quasi permanent hair color is gentle on the hair structure, but gets lighter with each hair wash. This type of color keeps the hair structure soft.
Tempoary colours do not affect the hair structure. They lie on the hair cuticle and are washed off straight away when you shampoo your hair.
It might make your hair dry and will cause split ends
The most gentle hair dye is a vegan hair dye, like Special Effects or Manic Panic. They do not damage the hair like chemical hair dyes. They are Semi Permanent.
With the use of dyes
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because it make hair dry
Aromatic ring present in all dyes structure ,because its mainly based on radical and nucleophilic