荧光增白纺织品的白度评价

白色在CIELAB颜色空间中仅占约3%，但在人类生活中却极为重要。许多纤维材料含有天然或后续加工中形成的黄色杂质，严重影响其白度，需用进行化学漂白和荧光增白前处理。为了提高生产效率，研究人员基于白度视觉评估开发出白度指数公式，用于白度的仪器测量。但实践中发现，仪器测量方法并不能完全准确地进行白度评估，而在测量荧光白度时问题更加突出。本文主要讨论荧光增白纺织品白度的视觉评估与仪器测量之间的相关性，分析了影响荧光增白纺织品仪器测量白度的可能因素；提出了优化白度的视觉评估与仪器测量之间相关性的可行性方案，以提高荧光增白纺织品仪器测量白度的准确性。该文对于深入开展有关荧光增白纺织品仪器测量研究具有重要指导意义。

Whiteness evaluation of fluorescent whitened textiles

White colors comprise approximately 3% of the total volume of CIELAB color space, but the relative importance of white materials is much larger than perhaps the small volumetric sector that represents white in the CIELAB color space. Numerous fiber materials contain yellowish impurities which are natural or formed in production. Such yellowish impurities significantly impair materials' whiteness. Hence, chemical bleaching and fluorescent whitening are often performed to improve materials' whiteness. In order to increase production effectiveness of white materials, researchers have developed whiteness indexes based on visual evaluation of white materials for instrumental measurement of whiteness. However, the instrumental measurement has been found to be not so accurate for whiteness evaluation, especially for measuring fluorescent whiteness. This paper mainly discussed the correlation between the instrumental measurement and the visually perception of fluorescent whitened textiles, and highlighted the possible factors affecting the instrumentally measured whiteness of fluorescent whitened textiles. A research project was proposed to optimize the correlation between the instrumental measurement and the visually perception of fluorescent whitened textiles and thus to improve the accuracy of the instrumentally measured whiteness of fluorescent whitened textiles. This paper provides new insight into the whiteness evaluation of fluorescent whitened textiles by enhancing the correlation between the instrumental measurement and the visually perception of fluorescent whitened textiles.