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Hair type by LOIS system

It is important to know your hair type (straight, curly, coyly, wavy, thin or thick) because based on it you can easily choose the best hairstyle and choose properly needed hair care products.

There are many hair typing systems for objective measurements and for common discussion. But only 1-2 methods became popular and mostly used in hair industry.

LOIS hair typing system

LOIS hair typing system is considered very user friendly due to its simplicity. The main point of this hair typing system is to eliminate the need for labeling hair types by numbers as it is done by Andre Walker hair typing system. Why? Because according to Andre Walker hair typing system most black women fall into hair type 4 category and there has been some stigma associated with black women being labeled as the lowest number. As women sometimes can be very sensitive and emotional, it was decided to develop a new hair typing system with labeling hair type by letters.

Women noted that LOIS hair typing system is easy to understand with the visual representation of the letters and it encompasses more than just the curl pattern by addressing hair width, sheen and shine.

LOIS hair typing system defines three hair characteristics:

  • Hair pattern,
  • Hair strand size,
  • Hair texture.

LOIS hair typing system – hair type – hair pattern

First, you should wash your hair without any chemical products. Second, you should examine strands on freshly washed hair. Third, you should dry your hair and see where your strands fall.

Hair type – checking after washing

LOIS hair typing system is broken down by letters:

L = Bend,

O = Curl,

I = Straight,

S = Wave.

“L” hair type
“L” type means your hair is dominated by right angles and substantially bends with nearly no curve – when your hair has all bends, right angles and folds with little to no curve.

“O” hair type
“O” type means your hair strand curls or coils significantly and appear to be shaped like the letter “O” – when the strand is rolled up into the shape of one or several zeros like a spiral.

“I” hair type
“I” type means your hair has no distinctive curls or bends and primarily lies flat against your head – when your hair lies mostly flat with no distinctive curve or bend.

“S” hair type
“S” type means your hair strand has “S” shaped curls or waves with defined hills and valleys – when your hair strand looks like a wavy line with hills and valleys.

LOIS hair typing system – hair type – hair strands

Next step is to compare your hair to a piece of thread to find your hair width:

Thin, fine hair strands – means your hair is thinner than a thread;

Medium hair strands – means your hair is equal in size to thread;

Think hair strands – means your hair is thicker than thread.

LOIS hair typing system – hair type – hair texture

Hair texture also should be checked:

Thready hair – means hair has low sheen, with high shine if the hair is held taut, with low frizz. This type of hair wets easily but water dries out quickly.

Wiry hair – means hair has sparkly sheen, with low shine and low frizz; in most cases water beads up or bounces off the hair strands. This type of hair never seems to get fully wet.

Cottony hair – means hair has low sheen or high shine if the hair is held taut and has high frizz. This type of hair absorbs water quickly but does not get thoroughly wet very fast.

Spongy hair – means hair has pretty high sheen or with low shine with compacted looking frizz. This type of hair absorbs water before it gets thoroughly wet.

Silky hair – means hair has low sheen, very high shine, with a lot or low frizz. This type of hair easily wets in water.


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