In this work, standard laboratory printing applications with IGT (ISO 12647-2) were applied on uncoated and matte-coated papers using offset inks (DIN ISO 2846-1). Surface roughnesses of uncoated and coated sheets were recorded to be 195 and 13 ml/min, respectively. Air permanence values of uncoated and coated papers were found to be 5.6 and 0.103 μm/Pa·s, respectively. Changes in the print densities were recorded up to 48 h. Print density changes for uncoated and matte-coated papers were surprisingly found to be in similar paths (8% in the first 4 h), although significant differences between surface roughnesses were recorded. Furthermore, paper samples showed similar behaviors for the percent volume changes, where drop volume disappeared within 6 min. It is concluded that matte coating did not have any significant effects on print density change and drop volume change.
This study is about preparing different paper substrates with chemically stable hydrophobic and superhydrophobic surface coatings through spraying a mixture of poly(dimethylsiloxane) (PDMS) and inorganic particles. The method is easy to implement, reproducible and requires inexpensive starting materials. Non-colored and colored types of (i) raw paper (UC), (ii) glossy coated paper (GC) and (iii) matte coated paper (MC) surfaces were selected for surface modification through the coating application. Both water-based ink (WB) and solvent-based ink (SB) formulations were used to dye substrate surfaces. Investigations including surface wetting, optical and physical properties of the coated paper substrates revealed that the coating application method proposed is a promising lacquer alternative for packaging purposes.
Paper and cardboard are the raw materials frequently used in the printing industry. Pulp structure in papermaking process, surface roughness, and strength of electricity, moisture, thickness, thermal conductivity and optical properties are important parameter that influences printing quality. The surface structure of paper and cardboard needs to be improved for the quality prints. Among the methods of reducing paper surface roughness, sizing, coating and calendering processes can be counted. In the surface coating process, fillers are added to the formulations differently from sizing. While these fillers increase absorption, they also affect colour, opacity, gloss, surface roughness, contact angle etc. Materials containing zirconium oxide; due to the increase of strength, unaffected by chemical agents, high opacity and whiteness, it finds different usage area. In this study sizing and surface coating processes have been carried out in order to improve the surface properties of the paper, to improve the gloss, yellowness, whiteness, absorbency and contact angle of the paper. For this purpose, cationic starch and zirconium oxide coating formulations were prepared and applied onto paper with a paper coating tester under laboratory conditions. In addition, surface sizing with cationic starch has been done as a reference. Coated, sized and standard office type base papers were printed with IGT C1 offset printing test with magenta ink. The colour and gloss values of all printed and unprinted samples were measured. Printed samples, coated papers, surface sized papers and base papers were subjected to lightfastness test according to BS4321 and colour and gloss changes were examined with blue wool scale. The contact angle, absorbency and surface energies of all the obtained surfaces were determined. As a result, it has been found that zirconium oxide-added paper coatings have less glossy but lower contact angle and higher absorbency than surface sizing. It has been determined that the coated paper have worst yellowness and gloss changes with light aging. As a result, the addition of zirconium oxide to the coating improves printability.
The image on textile fabrics is created by various methods. The sublimation transfer printing method, which is one of the various image creation methods on fabric, was applied on nylon and polyester fabric in the study. The fabrics used were printed at two different temperatures, both 150 0 C and 200 0 C, and with a pressing time of 30 seconds, 60 seconds, and 120 seconds. L * a * b * values, wash fastness (staining and fading), delta E values of Cyan, Magenta, Yellow and Black colors, which are the process colors determined in the study, were measured alongside the analysis of fastness properties. It was determined that the image formation, pressing time and temperature-dependent fastness values on fabrics were 4/5 (very good). Sublimation printing has shown that application differences depending on both temperature and time cause changes in color values. Considering the costs, it is suggested that the printing time of 30 seconds can be preferred, when compared to the longer printing time in sublimation prints.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.