Physical Properties Of Hair

Physical Properties Of Hair


The root of the hair is thicker, and the thinner the hair ends, so the hair diameter is also different. It can be divided into normal hair, thick hair, and fine hair.

Hair shape can be divided into three types: straight hair, wavy curly hair, and naturally curly hair. The cross-section of straight hair is round, the cross-section of wavy curly hair is oval, and the cross-section of naturally curly hair is flat. The thickness of the hair is not related to whether the hair is straight or curly.

Water absorption of hair: Generally, the water content of normal hair accounts for about 10%.

The elasticity of the hair refers to the ability of the hair to be pulled to the maximum extent, and it can still restore its original state. A hair can be stretched about 40-60%, this expansion rate depends on the cortex. The tension of the hair refers to the strength of pulling the hair to the limit without breaking. Healthy hair can support about 100-150 grams of weight.

The formation of various shapes of hair is mainly due to the internal cause of the composition of the hair. The curling of hair is generally thought to be related to its keratinization process. For curly hair, it tends to be eccentric in the hair follicle. That is, the root sheath is thick on one side and thin on the other side. On the side near the thin root sheath, the keratinization of the trichomes and fur coat cells begins early; on the side near the thick root sheath, the keratinization starts late, and the keratinization process hinders the growth rate of the hair. As a result, the half of the early keratosis is slightly shorter than the other half, and as a result the hair curls toward the side of the early keratosis.

In addition, the fur and hair coat are hard proteins (sulfur-containing), and the medulla and inner root sheath are soft proteins (not containing sulfur). Due to the different properties of keratin, the process of diagonalization, that is, the morning and evening It will have a certain impact. If three hair follicles open together in one pore, or one hair follicle has two hairs, these conditions may cause the arrangement of keratinocytes in the hair to change and grow in a curled shape.

Perm causes hair to become frizzy, which is why the hair keratin is artificially twisted.

Hair is a complex and unique structure that plays a vital role in our overall appearance. Understanding the physical properties of hair can help us better care for our locks and maintain their health and beauty.

One of the most important physical properties of hair is its strength. Hair is made up of a protein called keratin, which gives it its strength and elasticity. However, this strength can be compromised by various factors such as heat damage, chemical treatments, and environmental stressors.

Another important property of hair is its thickness, which is determined by the number of hair follicles present on the scalp. People with naturally thick hair have more hair follicles, while those with thin hair have fewer. This can also be affected by factors such as age, hormonal changes, and genetics.

Hair also has a specific texture, which can vary from straight to curly and everything in between. The shape of the hair shaft determines the texture of the hair, with straight hair having a round shape and curly hair having a more oval shape.

Finally, hair color is also a physical property of hair, determined by the presence of pigments called melanin. The more melanin present, the darker the hair color. However, hair color can also change over time due to aging, hormonal changes, and environmental factors.

Overall, understanding the physical properties of hair can help us better understand and care for our hair. By taking care of our hair, we can maintain its strength, thickness, texture, and color to keep it looking healthy and beautiful.




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