The hair surface condition underlies many visually perceived attributes such as shine, colour and the 3D perception of a curly hair style. Many factors can alter the hair surface such as cumulated cleansing/styling regimens or chemical treatments which can lead to degradation of the cuticle edges and surface. Similarly, pollutants, sebum, and shampoo/conditioners can build up on the hair surface which are also perceivable to an observer.

中文翻译：

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头发表面质量：激光散射作为表征洗发水和护发素表面状况和沉积物的工具。

头发表面状况是许多视觉感知属性的基础，例如光泽、颜色和卷发造型的 3D 感知。许多因素可以改变头发表面，例如累积的清洁/造型方案或化学处理，这会导致角质层边缘和表面的退化。类似地，污染物、皮脂和洗发水/护发素会积聚在头发表面，观察者也能察觉到。