Correlating Porosity and Tensile Strength of Chemically Modified Hair
By: Ali N. Syed and hasan Ayoub, Avlon Industries Inc.
Posted: May 6, 2003, from the November 2002 issue of Cosmetics & Toiletries.
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6 pages available as a PDF download or printed copies mailed to you
Article Keywords:
- hair porosity
- hair tensile strength
- hair damage
- permanent hair colors
- avid permanent waves
- hair relaxers
- hair bleaches
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Over the years, many individual studies have been conducted regarding the extent of damage imparted to hair. These studies deal with the damaging effects of various chemical processes such as permanent waves, permanent colors and hair bleaches.
The most commonly employed method to quantify this damage is the measurement of change in tensile properties of the hair. This method takes two to three days in the preparation of samples of hair fibers. It also requires a minimum of 30 to 40 fibers for statistical analysis. Therefore, there is a need for other simpler methods that are equally valid and less time-consuming.
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