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Electron microscopy and tomography reveal that sodium 2‐naphthalene sulfonate incorporated into perming solutions swells and tilts trichocyte intermediate filaments causing straightening of curly Japanese human hair

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A new hair‐care process has been specifically developed for the straightening of curved Japanese woman's hair . The process included sodium 2‐naphthalene sulfonate (SNS) in the reduction and oxidation steps of a conventional perming process. Our objective was to develop an understanding of how this process caused hair straightening by measuring the changes to morphology and ultrastructure between untreated, conventionally permed and SNS permed hair. Untreated and SNS permed Merino wool fibres were used to confirm structural changes.
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Keywords: chemical treatment; electron microscopy; hair straightening; intermediate filament swelling; statistics; ultrastructure

Document Type: Research Article

Publication date: April 1, 2019

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