How Hair Color Works On Hair | Science Behind Hair Color

Posted by Usama Tariq on

For the sake of beauty, we love coloring our hair. Sometimes, we color our hair to reflect our inner sense and individuality. Other times we color our hair to experience a fresh change affecting our mood, helping us out of boredom. Whatever the reason is, have you wondered how these big changes in your looks take place? How does a hair color work on your hair? It actually all comes down to the structure of the hair. If you are curious about how wearing different colors on your hair is possible, you need to learn about the hair structure first. Let's chew on the basic points.

Major parts of a hair:

A hair looks so thin but it also has some major parts that define its structure. These parts play a vital role in hair color science and how it will work on your hair. 

Hair Structure

  1. Cuticle:

Cuticle is the outmost layer of hair. It has some overlapping scales that protect the middle layer of hair from the outer environment.

  1. Cortex:

The inside of the cuticle is the cortex. It is the structure that gives strength, shape, and appearance to the hair. It contains pigment that gives your hair its natural color.

  1. Medulla:

Medulla is a hollow cylinder structure that lies in the middle of the hair shaft. It does not have any role in the coloring process.

  • Key fact: Cuticle and cortex are the only two structures of hair that work in the hair coloring process.

Let's study the main three types of hair color and how they replace natural hair color.

How Semi-Permanent Hair Color Works?

Semi-permanent hair color contains small molecules that only partially penetrate the hair shaft. These molecules sit on top of the cuticle and don't enter the cortex, which means that the color will gradually fade away after a few washes.

  • Semi-permanent hair color is perfect for those who want to try out a new color without making a long-term commitment.

How Demi-Permanent Hair Color Works?

Demi-permanent hair color contains slightly larger molecules than semi-permanent hair color. This means that it can penetrate the hair shaft a little deeper. The molecules are small enough to not enter the cortex completely. So the color will gradually fade away after around 20 washes.

  • Demi-permanent hair color is perfect for those who want a slightly longer-lasting color change.

How Permanent Hair Color Works?

Permanent hair color contains larger molecules that can fully penetrate the hair shaft and enter the cortex. The color change is more long-lasting. The dye reacts with the melanin pigment in the cortex and alters it permanently.

  • Permanent hair color is ideal for those desiring a long-lasting and high grey hair coverage result. It’s a great option for people who want a dramatic change. Those going from really dark to really light or vice versa.

Process of hair color deposition:

The hair color enters the hair cuticle and makes its way toward the cortex. In the cortex, it reacts with our melanin pigment. It works to alter the pigment and replace it with the desired color.

Major components of hair dyes for color deposition:

Major components of hair color activate the color reaction and make the deposition possible involves:

  • Alkaline Solution

The alkaline solution usually contains ammonia that opens the hair shaft to allow the color to reach the cortex.

  • Developer

Developers contain Hydrogen Peroxide which is an essential component for the development of hair color. It decolorizes the natural melanin pigment and helps to replace the pigment with the desired hue.

What’s so special about Eazicolor hair colors?

Surely, its micro connective technology and vitamin E compounds are great. They make the process of color deposition less damaging than other hair colors.

How Eazicolor’s hair color works better:

  • We color our hair with permanent hair color. For this, the first step is to open the cuticle with an alkaline solution. This solution consists of ammonia, which swells the cuticle and allows the color to enter. Eazicolor is made of micro connective technology. Its formulation contains a smaller molecule size which can absorb easily through the hair cuticle. This makes the ammonia content very low in the formula. The micro connective technology includes a lower moisture content. It means the color molecules can bind more easily to the hair fibers. This allows for a more even and long-lasting color result, as the color is less likely to wash out or fade.
  • Once the cuticle is open, the color can go into the cortex and deposit new pigment. Eazicolor contains the antioxidant vitamin E, which helps to protect the hair from damage during the coloring process. It provides active conditioning properties to produce a supple, sleek, and healthy hair look.
  • Eazicolor offers the best coverage for grey or resistant hair. Its long-lasting and non-damaging qualities make it the best. The smaller molecule size of the color can help to penetrate stubborn hair strands. It can deposit color more evenly. This results in a more uniform and natural-looking color result.
  • Eazicolor hair color allows you to use it to achieve a wide range of color shades and tones. A colorist can use his ability to customize the concentration of ammonia and hydrogen peroxide. He can create a personalized color that complements the client's skin tone and features.
  • Eazicolor hair color formulation with Vitamin E helps to enhance the vibrancy and shine of the color. It results in a more youthful and healthy-looking appearance.
  • Eazicolor contains no such harmful chemicals that may be devastating for your health.


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