印刷色度和高光澤度反射表面外觀表現相關性之研究

Study on the Colorimetric Parameter’s Correlation with the Printing Performance on Highly Reflective Surface

隨著科技不斷成熟，文化用紙逐漸減少，包裝印刷領域已成為各大公司競爭的焦點。在此領域，各種炫目的材質和特殊印刷技術擁有很大的優勢。另一方面，隨著設計師和品牌商對色彩要求的不斷提高，國際印刷色彩標準認證似乎已成為這個行業的最低門檻。雖然對於常見紙材的印刷色彩管理已經進行了大量的研究，並且已經發展出標準化的方法，但對於高光澤度材料的色彩表現方面，相關的製程研究比較少。目前的研究多以網點擴大為分析目標，而不同材料對印刷色彩的影響極大。因此，本研究將使用真空鍍鋁紙作為擁有鏡面反射光的實驗基材，對其進行色度分析；本研究分為兩部分，第一部份比較包含鏡面反射光（SPIN）、不包含鏡面反射（SPEX）與一般銅版紙於各主色上色度參數和色差的關係性，並利用迴歸分析對色度主成分以及色差建立方程式。可發現L參數和色差皆有高度的相關性，而a*b*值則是取決於該色的色相位於色度座標的不同象限；第二部分則是加入光澤度數據，分析C、M、Y、K各色色度主成分和光澤度的關係，並使用迴歸分析建立方程式。

With the continuous maturity of technology and the gradual reduction of cultural paper, the field of packaging and printing has become the focus of competition among major companies. In this area, a variety of dazzling materials and special printing techniques have great advantages. On the other hand, with the continuous improvement of color requirements of designers and brand owners, international printing color standard certification seems to have become the minimum threshold for this industry. Although a lot of research has been done on the printing color management of common paper materials, and standardized methods have been developed, there are relatively few related process researches on the color performance of highgloss materials. Most of the current research focuses on dot gain, and different materials have a great influence on printing color. Therefore, this study will use vacuum aluminum-coated paper as the experimental substrate with specular reflection light, and conduct colorimetric analysis on it; this study is divided into two parts. The first part compares the specular reflection light (SPIN) and does not include specular The relationship between reflection (SPEX) and general coated paper's chromaticity parameters and color difference in each main color, and use regression analysis to establish equations for the main components of chromaticity and color difference. It can be found that there is a high correlation between the L parameter and the color difference, and the a*b* value depends on whether the hue of the color is located in different quadrants of the chromaticity coordinates; the second part is to add gloss data to analyze C, M, The relationship between the principal components of each color of Y and K and the glossiness, and use the regression analysis to establish the equation.