Cyclic Testing: Demonstrating Conditioner Benefits on Damaged Hair

December 31, 2003 | Contact Author | By: Sidney B. Hornby, Mar-Tech Contract Services Inc.
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  • Keywords/Abstract

Keywords: hair damage | cyclic testing | fiber fatigue | Weibull parameters | conditioning

Abstract: Cyclic fatigue testing simulated stresses experienced by hair fibers from repeated grooming and styling. Researchers used the Weibull parameter of characteristic life to assess damage. Survival probability graphs showed conditioner use helped damaged hair.

Most consumers of today’s hair-care products desire strong, bouncy hair that is full of shine. Despite this desire, consumers do not want to give up strenuous styling regimens (such as bleaching, perming and coloring) that can lead to cumulative damage of the hair fibers.1 Over time, even combing and brushing can damage the hair cuticle, and create cracks and flaws on the fiber surface,2 leading to loss of luster and significant fiber breakage. Therefore, consumers are looking for formulations that will nourish, protect, and even “heal” the hair if damaged.


Formulators are challenged to devise products that actually fight these effects, because today’s demanding consumer requires that these products be proven effective when making a choice from the selection available.