Method of judging degree of hair damage
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United States of America Patent
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N/A
Issued Date -
Dec 14, 2006
app pub date -
Mar 2, 2005
filing date -
Mar 31, 2004
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The present invention relates to a method of noninvasively and quantitatively evaluating a degree of a hair damage, specifically the degree of a hair damage caused by a permanent treatment and/or the degree of a damage caused by an oxidation treatment. The degree of a damage of a hair, whose degree of a damage is unknown, is evaluated on the basis of a correlation between the degree of a hair damage and a result of multivariate analysis near infrared absorption spectrum of the hair. The correlation can be obtained based on a result of multivariate analysis of near infrared absorption spectra of two or more kinds of hairs, whose degree of a damage is known. Furthermore, a hysteresis of treatment applied to the hair or the likelihood to be easily damaged by a treatment is determined from the obtained evaluation result. Principal component analysis (PCA), SIMCA, or KNN is preferably used as an algorithm of the multivariate analysis.
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