印品质量控制中的密度和色度测量技术

Density and Chrominance Measurement in Printing Quality Control

目前印品质量检测主要有2种方法,密度测量法和色度测量法。在密度测量中,分析了密度计的测量原理,并列举了可以测量的主要印刷参数,如印刷反差、叠印率、网点面积率等;在色度测量中,介绍了2种主要的测量仪器:光电色度计和分光光度计;最后,从设备校正及正确设置仪器参数等方面,分析了如何提高测量精度的方法。

There are mainly two methods of printing quality control measurement, density measurement and chrominance measurement. The basic principle of densimeter for optical density measurement was introduced, and a series of derived quality parameters were illustrated, such as contrast, ink trapping, area coverage, and so on. Two measurement devices used in chrominance measurement, photoelectric colorimeter, and spectrophotometer were introduced. Some methods to improve the accuracy, from device calibration to setting device parameters, were analyzed.