Interactions of ink colourants with chemically modified paper surfaces concerning inkjet print improvement

Abstract

h i g h l i g h t s < The paper surface modification with surfactants and a cationic polymer was achieved. < Paper modification with poly(diallyldimethylammonium) improved inkjet print quality. < FTIR is of most helpful to access the functional groups of inkjet dyes and pigments. < Sulphonate-containing dyes were better fixed on a polar surface with cationic groups. < Low paper surface energy helped the inkjet pigments fixation at the paper surface.

Cellulose micro and nanofibrils as coating agent for improved printability in office papers

“…Nonetheless, when comparing with the performance of the uncoated base paper, none of the CMFs used were able to significantly improve the printing quality. Additionally, the paper surface-sized with only starch presented a smaller gamut area (as previously reported by Sousa et al 2013). Starch is usually modified (Lee et al 2002;Li et al 2019) or used in combination with other compounds (polyvinyl alcohol, styrene acrylate latex, among others) (Moutinho et al 2007;Saraiva et al 2010;Sousa et al 2014) to succeed as printing quality enhancer.…”

Introducing new methods based on the standard ISO/IEC 24790 to evaluate graininess for coloured printed images

“…7 In an inkjet printing process, one of the most common digital printing processes, three main parameters have a fundamental role in determining the printing quality: printer device, physical-chemistry properties of ink, and substrate characteristics. 8 Since any upcoming issues in these parameters can cause undesirable changes in the final printed image, and due to the extensive use of printing in numerous fields, one of the biggest challenges in the printing industry is to control the quality of printed images and to recognise the effective parameters on printing quality. 9 Until the last few years, detecting defects of printed materials has generally been a manual process.…”

Dynamic Interactions of Pigment-Based Inks on Chemically Modified Papers and Their Influence on Inkjet Print Quality

“…16−27 Regarding the surface sizing, a few studies focusing this subject have been published. [4][5][6][7][8]11,14 However, this matter is particularly important because office papers are uncoated but surface sized.…”

“…The printing technology affects drop formation and jet stability of the ink. The most important ink properties are viscosity, surface tension, and nature of the colorants. − The paper characteristics, such as surface topography and porosity, surface energy, and chemical groups present at the paper surface determine the ink setting and adhesion. − The surface sizing, coating, and/or calendering are processes used to modify paper properties and improve print quality. Surface sizing involves the application of a formulation on the paper surface, typically composed of starch and a hydrophobizing agent, with a dry solids content ranging from 2 to 15 wt %. , Nevertheless, polymers such as modified starches, polyvinyl alcohol, sodium alginate, carboxymethyl cellulose, polyurethane, styrene-acrylate, and styrene-maleic anhydride copolymers have also been used. ,− Sizing formulations including polyoxometalates, polymers based on glycol ethers, magnesium chloride, or quaternary agents derived from fatty acids are also reported in the literature. − , …”

“…Most published studies concerning paper surface treatments are focused on the coating contribution in the inkjet print quality. − Regarding the surface sizing, a few studies focusing this subject have been published. − ,, However, this matter is particularly important because office papers are uncoated but surface sized.…”