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Hair elasticity

20% to 30% - The percentage to which a healthy and dry hair can lenghten without breaking.

50% - The percentage to which a healthy and wet hair can lenghten without breaking.

20 to 30% - The percentage of swelling of the hair when wet. More hair is healthy, less it absorbs water.

30 to 50% - The percentage of weight of water that can be absorb by the hair.

Indeed, a healthy hair have a good elasticity.

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