A recent study by Bajaj Consumer Care, Ltd., sought to identify a method to measure oil penetration into hair and how this correlates with hair thickness and tensile strength.
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Load curve obtained from the tensile test of a hair
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Penetration of different molecular weight hydrolysed keratins into
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PDF] Investigation of penetration abilities of various oils into
Comparing hair tensile testing in the wet and the dry state
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Micrographs (250X) of hair showing thermal cracks and narrow
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Comparison on Quality Performance of Human Hair Types with Herbal