Consumers whose style creation process involves straightening hair are frequently troubled by frizz. The cause of this predominantly relates to re-adsorption of moisture from the environment which leads to progressive reversion of the water-set. This occurrence is exacerbated by high humidity conditions, where especially high levels of adsorption lead to increased plasticization and more rapid style loss.
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High quality digital photographs are taken to quantify the initial area of the hair and then the relative humidity raised to the target value. Photographs are taken periodically to allow visualization and quantification of the hair state at pre-determined time values.

Time lapse video of a tress initially equilibrated at low relative humidy put into a chamber of high humidity: