Today, both men and women frequently colour their hair to cover grey or white hair or to modify the colour of their natural hair. Thus, one of the main services that hair salons offer to their clients to make them feel more confident with a fashion statement or a younger look is hair colouring.

The Three Different Hair Dye Types :

Temporary, semi-permanent, and permanent hair colours all produce distinctively coloured hair. Permanent and semi-permanent hair colours, both of which contain a variety of chemical compounds, are typically used in hair salons.

Let's first have a look at the structure of hair before we examine how various hair colours function.

Three layers make up the hair shaft, or each individual hair strand:

The cuticle, the outermost layer with overlapping scale-like cells that guard the inner structure of the hair, and the medulla, 

The innermost layer. The cortex, the middle layer, includes keratin (proteins) and melanin, which give our hair its natural colour.

How to Use Chemical Hair Dye

They merely adhere to the cuticle like a coat of paint when using temporary hair colour. As a result, the colour typically lasts between 1 and 2 washings.

Molecule pigments in semi-permanent hair dyes are small enough to pass through the cuticle's scale-like cells and adhere to the cortex. Usually, the colour deteriorates after five to ten washings.

Permanent hair colours alter the hair's chemistry in a way that makes the colour last till the hair grows back or falls out. A chemical, such as ammonia or a milder replacement, is used to open the cuticle's scale-like cells when using permanent hair colouring. Then, a different chemical known as the developer is employed to remove the natural hair colour from the melanin and start chemical reactions that cause the new colour to be oxidised and deposited into the hair cuticle. The colour does not deteriorate after numerous washings thanks to the chemical dye. Despite high colour retention, damaged cuticles and diminished moisture in the hair lead to dry, damaged hair.

How to Use Ammonia Free Hair Colour

Lawsone is a naturally occurring red colouring agent found in henna. Henna paste coats the hair shaft when applied to colour hair, and lawsone slowly migrates into the hair shaft through openings in the cuticle. It then binds with keratin and fortifies the cuticle. The outcome is hair that is naturally pigmented. The colour of the hair sets and deepens with continued application.

The capacity of the hair to retain moisture is boosted along with its overall strength. Additionally, the condition of the scalp is improved, which reduces dandruff and hair loss. Henna's surface layer shields hair from pollution and UV radiation, resulting in healthy, lustrous hair overall.

Difference between Natural Henna and Chemical Hair Dye :

While chemical hair dyes have a good colour retention rate, the method they penetrate the hair shaft to colour the hair damages the hair and scalp and hastens the ageing process. On the other hand, natural henna hair dye enhances the health of the hair and scalp while naturally colouring the hair, delaying the ageing of the hair and scalp.

While natural herbal colours are skin-compatible, chemical-based hair dyes are to blame for skin and other skin-related illnesses. Hair has a significant role in self-expression in today's fashionable society, and no ammonia free colour is utilised for healthy hair because it has no negative side effects.