HAIR DENSITY

Measures the number of individual hair strands on one square inch (2.5cm) of scalp. It indicates how many hairs there are on a person's head. Hair density can be classified as low, medium or high (or thin, medium, or thick-dense). Hair density is different from hair texture in that different individuals with the same hair texture can have different densities. Some individuals may have coarse hair texture (each hair has a large diameter), but low hair density (a low number of hairs on the head). Others may have fine hair texture (each hair has a small diameter), but high hair density (a high number of hairs on the head).

The average hair density is about 2,200 hairs per square inch. Hair with high density (thick or dense hair) has more hairs per square inch. Hair with low density (think hair) has fewer hairs per square inch. The average head of hair contains about 100,000 individual hair strands.

DRYHAIR AND SCALP

is caused by inactive sebaceous glands and is aggravated by a dry winter or desert climate. The lack of natural oils (sebum) leads to a flaky scalp and hair that appears dull, dry, and lifeless. Dry hair and scalp should be treated with products that contain moisturizer and emollients. Frequent shampooing should be avoided, along with the use of strong soaps, detergents, or products with a high alcohol content because they may aggravate the condition. Dry hair should not be confused with overly porous hair that has been damaged by thermal styling, environmental forces, or chemical services.

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