由於UV噴墨列印可快速固化的特性，其加值產品已廣泛應用於文化創意產業，以磁磚為材質之裝飾藝術商品更是比比皆是。近年噴墨列印的機材廠商不斷的研發新的列印技術，亦可見提升UV噴墨列印品質之相關研究，唯仍未見有針對不同影像原稿特性而能有最佳列印品質之相關研究。
本研究以目前噴墨列印積極發展之可變墨滴技術(Variable drop technology)及解析度為基礎，針對不同階調原稿特性，嘗試找出最佳之複印模式。研究結果可提供UV噴墨列印廠商發展具親和性的使用者介面(User-friendly interface)，方便使用者針對不同階調的原稿特性能作最佳、最快速之輸出設定選項，且能獲得較佳之品質。本研究針對不同階調的原稿特性(High-key、Normal-key、Low-key)，建立固定墨滴(3、5drop)與可變墨滴(1,3,5，1drop=7pl)、不同解析度(720x300dpi、1080x600dpi、1440x1200dpi)的九種複印模式。採用主觀評估實驗之配對比較法，找出UV噴墨列印於磁磚材質上其最佳品質的複印模式。
本研究根據半色調網點及可變墨滴技術之相關理論，先作出研究推論，研究結果顯示與研究推論大致呈現一致性的結果。說明如下：一、不論何種階調原稿，可變墨滴配合高解析度可獲得較佳之品質。二、在相同解析度下，High-key原稿使用較小的墨滴可有較佳品質呈現。三、在相同解析度下，Low-key原稿使用較大的墨滴可有較佳品質呈現。四、不論何種階調原稿，高解析度仍必須配合小墨滴方可得到較佳品質。
Owing to the rapid curing behavior of UV Inkjet printing, this value-adding product has been widely adopted in the cultural creative industry. Artistic decorations made from ceramic tiles are one common use. In recent years, inkjet printer manufacturers have been constantly developing innovative printing technology. Research related to the improvement of UV Inkjet printing quality has been conducted as well. However, extant research mainly focuses on the output quality optimization. There has been little research based on different characteristic of originals in order to enhance print quality.
Based on developments in variable drop technology and resolution attributes, this study tries to identify the best reproductive modes for different tone of originals. The conclusions provide a reference for manufacturers seeking to develop a user-friendly interface and provide users a convenient way to configure the most appropriate setting according to different tone of originals and thus generate a better image. The research develops nine different printing modes, i.e. Normal dot (3, 5 drop), Variable drop (1,3,5, 1 drop =7 pl), and Different Resolution (720x300dpi、1080x600dpi、1440x1200dpi). The study uses a pair-comparison method of subjective assessment so as to find the appropriate setting that could produce the best UV Inkjet printing quality on ceramic tile.
Proceeding from the theories of Halftone dot and Variable drop technology, the study’s results are virtually identical to the inferences.
The study’s key findings are:
1. Variable drop with high resolution setting could get higher printing quality no matter what kind of the original image tone is.
2. Based on the same resolution, a high-key original image could receive a higher quality by adopting a smaller drop.
3. Based on the same resolution, a low-key original image could receive higher quality by adopting a larger drop.
4. High resolution with small drop will generate better quality regardless of the original image tone.
