摘 要：紙作為印刷的主要原材料，它的性能如何，決定印刷墨色的質量。只有性能好的紙張，才能獲得較好的印品呈色效果。所以，正確認識紙張性能與印品呈色的關系，根據印刷產品、工藝條件特點，合理選擇紙張進行印刷，對提高產品質量具有重要的現實意義。
本課題研究紙張的表面性能與印刷品呈色范圍的關系。檢測了80g/膠版紙和108g/銅版紙的一些紙張性能，包括白度、平滑度、光澤度吸收性和吸收等參數，用彩色反射密度計測量了兩種紙張印樣各色實地塊處的XYZ三刺激值，根據三色坐標的計算公式，計算得到x、y色度坐標，繪制了兩種印樣的色域圖。實驗結果表明，當印刷條件相同時，由于銅版紙具有較高的平滑度、白度、光澤度和較小的吸收性，其所能表現的呈色范圍較大；而膠版紙的平滑度、白度、光澤度均低于銅版紙，吸收性較大，其所能表現的呈色范圍較銅版紙小。本文實驗結果對評價印刷用紙質量及提高印刷品的呈色范圍具有一定的參考價值，在實際生產中可以作為指導生產的依據。
關鍵詞：紙張性能 ；XYZ三刺激值；色度坐標；呈色范圍
Abstract: As the main raw material for printing , paper`s performance is the key reason to the quality of printing ink .And only paper which has good performance can has better printing quality. So it is necessary to know the relationship between the paper`s performance and color effect .And we can be reasonable to select paper based on the product and printing technology. This is meaningful to improve the product quality.
This issue discusses the relationship between the paper`s performance and the color gamut..The samples of offset paper and chrome paper were chosen and measured ,including whiteness, smoothness gloss and absorbability. And the two samples were printed with the same printing machine. The tristimulus values (X,Y and Z) of solid areas were tested. Chromatic diagram were drawn after data analyzing and processing ,and then the influence of paper performance on gamut of color was analyzed. The result shows that greater color range occurred because of higher smoothness, gloss ,whiteness and lower absorbability to chromatic paper when the printing conditions were definite .
Key Words: Paper performance; XZY tristimulus values; chromatic coordinates；color range
