Today the print quality of digital printing techniques has improved and is considered satisfactory and competitive to analogue techniques for certain graphic products. Satisfactory print quality mostly depends on the interaction of ink and printing substrate where ink penetration has an important role. Namely, the ink penetration affects the parameters that describe the print quality together with visual appearance of print density and mottling. Therefore, it is important to select an adequate printing substrate for each printing technique. Awareness of environmental problems related to the shortage of wood raw materials has led to an increase in the use of recycled printing paper and in particular the implementation of new alternative sources of cellulose fibres instead of virgin wood fibres in the papermaking process. In this research the emphasis is precisely on defining the influence of ink penetration into laboratory papers made of triticale pulp on the final print quality. The laboratory printing papers were obtained by mixing triticale pulp with pulp from recycled fibres in three different portions. Papers were thereafter printed by ultraviolet (UV) inkjet printer and the ink penetration within laboratory papers with and without straw pulp was analysed using two methods of ink penetration analysis (microscopic/spectroscopic). The influence of ink penetration on the final print quality was observed and analysed based on several quality parameters (optical ink density, mottling and colorimetric values). These results confirmed that triticale pulp in laboratory papers provides equal print quality compared to laboratory papers made only from pulp from recycled fibres.

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评估 UV 喷墨墨水渗透到黑小麦纸浆中的实验室纸张及其对打印质量的影响

今天，数字印刷技术的印刷质量已经提高，被认为是令人满意的，并且与某些图形产品的模拟技术相比具有竞争力。令人满意的印刷质量主要取决于油墨和印刷基材的相互作用，其中油墨的渗透具有重要作用。即，墨水渗透会影响描述打印质量的参数以及打印密度和斑点的视觉外观。因此，为每种印刷技术选择合适的印刷基材很重要。对与木材原材料短缺相关的环境问题的认识导致再生印刷纸的使用增加，特别是在造纸过程中使用新的纤维素纤维替代来源代替原生木纤维。在这项研究中，重点是明确墨水渗透到由黑小麦浆制成的实验室纸张中对最终印刷质量的影响。实验室打印纸是通过将黑小麦浆与来自回收纤维的浆在三个不同部分中混合而获得的。之后通过紫外线 (UV) 喷墨打印机打印纸张，并使用两种墨水渗透分析方法（显微镜/光谱）分析有和没有草浆的实验室纸张中的墨水渗透。根据几个质量参数（光学墨水密度、斑点和色度值）观察和分析墨水渗透对最终打印质量的影响。