The Study on Print Quality Attributes of Water-based Coating by Adding the Wear Agents

• Main Authors: LIU, KEN-TU, 劉耕圖
• Other Authors: CHEN, CHANG-LANG
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/s9h3m6

碩士 === 國立臺灣藝術大學 === 圖文傳播藝術學系 === 106 === Applying water-based coating on printed products forms a durable scratch resistant coating and a highly glossy surface on top of the product as its protection. On the other hand, the traditional oil-based coating technique raises severe environmental issues, especially those contain Volatile Organic Compounds which are strictly being regulated by the governments and various regional laws. As the result, the focus of coating techniques shifts to the development of water-based coating. The process of applying the water-based coating and corresponding equipment is critical to the final result on the product. This research will focus on the study of the utilization of water-based coating and defining the influencing variables in all aspects. To understand the correlation between color print attributes and physical attributes of the product with additional coating additives. Apply the exact same steps of printing and wear agent on two different types of paper five times, the 150P two-sided coated paper and the 350P single coated board. Each time adds more wear agent from 0%, 2%, 5%, 8%, until 10%. Observing the difference of Solid Ink Density, Tone Value Increase, Print Contrast, Ink Trapping, Color Difference and Color Gamut and the physical attributes (Scratch resistance and Glossiness) changed among the different percentage of wear agent added. The result shows a significant variance between the two types of paper/board in terms of Solid Ink Density (P<0.05). The variance within ±0.05 presents strong influence on colors by density. Each tone value increase at most increased by about 2%. Print Contrast is mostly within standard value. The Print Contrast of both materials before coating and additive are higher than after coating and additive with maximum variance by about 1%. Color Differences are all under △3 and mostly under △1.5. Not highly noticeable. Based on the Color Gamut, colors are tending to be more cyan, green, and yellow. Ink Trapping for both materials are deviating by about 0.5%. For the physical attributes on both materials after adding the additive, the glossiness of two-sided coated paper is higher than single coated board by about 25% due to ink being absorbed into the papers. The additive percentage and glossiness are in an inverse proposition. Regarding the scratch resistance test, 8% scratch resistant oil results 70% slightly scratch on two-sided coated paper, in contrast, only 2% wear agent results 70% slightly scratch on single coated board. The differences among different percentages of wear agent on both materials are significant (P<0.01) while percentages of additive and scratch times are in a direct proposition.