【作者】 郭婷；

【导师】 刘昕； 王晓奇；

【作者基本信息】 西安理工大学 ， 制浆造纸工程， 2008， 硕士

【摘要】 近年来配色技术有了较快的发展,但是很多专业油墨配色软件都集中在胶印的油墨配色上,理论研究也大都建立在胶印基础上,专门的丝网油墨配色软件较少。这为丝网油墨配色带来很大的不便,再加上丝网印刷多数情况要用到专色实地,所以本文对丝网油墨配色进行研究。本文研究的主要内容是结合Kubelka-Munk理论和色度学原理,建立丝网油墨配色模型。通过迭代法改善油墨配方,以提高配色精度,并对模型进行了优化,加速并进一步精确了配色过程,保证彩色原稿的忠实再现,并为配色技术提供理论和技术支持。本文以印刷色彩学理论为依据进行油墨配色,根据实际中的丝网油墨的配色规律,把Kubelka-Munk理论和印品三刺激值计算公式结合建立丝网油墨配色数学模型,得到丝网油墨配色的初始配方,并对配方在Matlab中进行迭代改善,得到最终的配方。按照丝网油墨配色实验设计,在手动丝网印刷机上进行人工配色。待油墨干燥后测量其反射率,并通过公式计算其k/s值。在Matlab中分析数据处理结果,结果表明当调配的青油墨的比例大时,调配出的油墨反射率和k/s值的线性变化较小,黄油墨的比例大时,调配出的油墨反射率和k/s值线性变化较大。本文根据调配油墨的反射率和k/s值的非线性变化对配色模型进行了优化,优化方法采用经验指数修正法,可以提高配方精度,加快油墨配方的迭代速度。更多还原

【Abstract】 The color matching technology has developed rapidly in the recent years, but many professional software of color matching focus on the offset ink color matching, most of theoretical research is largely built on the offset, and there is fewer specialized screen ink color matching software. These bring a lot of inconvenience to the screen ink color matching; moreover, the spot color is used in the screen printing usually. The purpose of this paper is to study the screen ink color matching.The main content of this paper was to combine the Kubelka-Munk theory with colorimetric theory, build model of the screen ink color matching, enhance the color accuracy by the iterative method, and improve the process of the color matching by optimizing the model. The manuscript color was reproduced truly. Theoretical and technical support was provided to color matching.Based on the printing chromatics theory, matching color was done. Screen ink color matching model was established by combining kubelka-munk theory with printing tristimulus values formula, according to the disciplinarian in the actual screen ink color matching. The results was to get the initial formula of screen ink color matching, and amend formula by iterative in the Matlab for getting the final formula.Matching color experiment was done in the manual screen printing machine according to the experimental design, measured reflectivity after ink drying and calculated its k/s value by formula, and anglicized the data in the Matlab. Results showed that the proportion of C ink was bigger, the linear change of the reflectivity and k/s value of prepared ink were smaller, the proportion of Y ink was bigger, the linear changed of the reflectivity and k/s value of prepared ink were bigger. The color matching model was optimized basing on the nonlinear change of reflectivity and k/s value of papered ink. The optimizing method was experiential exponent modified method. The formula accuracy could be improved, and the iterative speed could be picked up.更多还原