Elasticity, The ability to stretch and return to its original shape, Porosity, The ability of the hair to absorb moisture and chemicals., Texture, The diameter of the individual hair strand., Density, The amount of hair strands per square inch on the scalp., Strand test, A trial application of the product on a small section of hair., History Chemical, Knowing if the hair has been bleached or colored in the past., New Growth, The untreated hair near the scalp that needs a stronger formula., Health Scalp, Checking for sores or scratches to avoid chemicals burns..

Grade 11 Consideration

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