Study on Photoaging Phenomenon of Digital Inkjet Presswork

Abstract

Following with the development and cooperation between digital printing techniques and digital distribution in publishing industry, more and more books will be printed by digital printing equipments, and then the storage stability became one of the focuses in digital printing research field. This study is to investigate the storage resistance property of inkjet presswork. In this paper, based on analyses about factors which influence photoaging phenomenon, a mathematic model which can separate the influence factors and an analytical method were proposed. Then, the experiment under absolutely natural lighting conditions was carried out, and the density decrease, which indicated the color change phenomenon after photoaging, were measured by an X-rite Spectroeye instrument. Through curve-fitting method, an empirical model was derived to demonstrate the rule of ink photoaging fading. Finally, the photoaging property of substrate and ink was analyzed, and the photoaging properties of the inkjet print were generalized. The research methodology and the fading model are of significant reference to the following research about photoaging phenomenon.

Effects of Photo-oxidation on the Properties of Hemp Office Papers

“…Hemicellulose exhibits similar behavior to cellulose, and lignin strongly absorbs in the UV and visible regions (Zervos, 2010). After light absorption, paper, as a printing substrate, may generate chromospheres (e.g., formaldehyde, furan, methoxy quinone, and stilbene) in acid and undergo alkaline hydrolysis and photo-oxidation degradation, which result in paper discoloration (Cui and Chen, 2011). To evaluate the permanence and durability of paper based on its chemical composition, different methods of accelerated aging have been used by researchers.…”

Colorimetric changes of waterbased flexographic ink printed on hemp-based papers exposed to artificial ageing

“…As paper is a multi-component material which can also include additives as starch, minerals, and synthetic polymers this component can also play a significant role in paper degradation due ageing (Area and Cheradame, 2011). After light absorption, the paper as printing substrate may generate chromospheres (as formaldehyde, furan, methoxy quinone and stilbene) in acid and alkaline hydrolysis and photo-oxidation degradation which results in paper discoloration (Xiaomeng and Guangxue, 2011). Printability of each substrate greatly depends on the interactions between the surface of printing substrate and used printing ink at the given printing process variables.…”