In recent years, the domestic printing market has begun to contract owing to the diversification of media because of the increasing popularity of devices such as smartphones. However, the use of UV or EB curing ink, which has strong resistance characteristics and dries instantly upon irradiation with ultraviolet light and electron beam, is expanding in various applications. In particular, the EB curing ink does not contain solvents (volatile organic compounds) or photo-initiator and is an environment, earth, and human friendly ink. In addition, the flexo printing system operates in various fields such as packaging materials (paper, film, and cardboard). In this paper, we describe the characteristics and possibilities of expected EB curing flexo ink for further printing diversification.
A high-quality⁄high-definition screen ink system has excellent accuracy and printing stability, which enables printing of a 100 μm thin line with ink flow out width within 116 μm. This ink system consists of three factors: ink, printing materials, and equipment (mesh technology, plate-making technology, and printing machine technology) , and a printing technology that can print both solid image and fine pattern such as dot with one ink at a time. High-quality⁄high-definition screen ink has characteristics of providing high viscosity and high thixotropy, re-producing plate-making pattern faithfully, and no spreading of ink flow out. In this article, the characteristics of high-quality⁄high-definition screen ink and a printing example, which was realized using the high-quality⁄high-definition screen ink system, are introduced.
The surface of the aluminum support for a lithographic printing plate needs a strong adherence with a photo or thermally sensitive layer to become an image area. However, it needs to be removed easily from the sensitive layer to become a non-image area. Furthermore, it is necessary to prevent the scumming ink from adhering to the surface of the aluminum support of the lithographic printing plate during printing. Therefore, it is necessary that the surface configuration of the aluminum support for the lithographic printing plate should be designed well for the surface shape from 10 microns order to a submicron order, and should have a less local deep part but enough roughness. The development of the surface configuration analysis methods make it possible to understand the surface configuration as the property values, and to design good printing plates based on the property values.
The printing market has been continuously decreasing, and every printing company needs to satisfy the market demand for small-scale production within a short delivery period, especially in offset sheet-fed printing. Therefore, the use of systems such as the energy saving UV curing offset printing system and powder-less ink system has been rapidly increasing. Under such circumstances, we continue to develop the rapid ink-drying printing paper to satisfy the market demand. The technological elements to be considered in this development are the analysis and control of the pore diameter and volume measured using the nitrogen adsorbing method for evaluation of drying performance. Further, the surface roughness is measured by scanning light interference microscopy for the evaluation of abrasion resistance of the printed area. As a result, we finally launched the new U-Lite Dry for Eastern Japan in October 2015 and Silver Dia Dry for Western Japan in June 2016. They received appreciably high evaluations not only in high-level drying performance and rub resistance, but also in printing reproducibility from majority of printing companies.
Kapok fiber is natural half-transparent hollow tube whose inner and outer diameters are 18 and 20 mm, respectively. This fiber excels in water repellence and absorbs oil due to the capillary force. In addition, the hollow rate of this fiber is higher than those of conventional synthetic fibers. The focus of this present work is to develop a novel paper sheet which integrating Kapok fibers containing chromic materials. The solvent which contains chromic materials was absorbed into Kapok fibers due to the capillary force. We found that the paper sheet exhibits reversible color change. Keywords: Security paper, Chromic material, Kapok fiber
When we consider viewing the surface of human skin, the skin gives us a sense of natural depth, while, in contrast, the surface of a plastic does not. In our research program, learning from the structure of human skin, we fabricated screens which consist of multilayers made of translucent sheets coated with TiO2 nanoparticles. The feeling of natural depth from the screen can be considered to come from the multiply-observed images produced by phase differences due to the translucent multi layers. Additionally, we think that the feeling of natural depth from our 3D imaging screen comes from the reflection⁄diffusion differences of light depending on its wavelength as well as human skin. This is because that the spectral distribution measurements of these translucent sheets suggest that blue light with short wavelength is scattered on the surface of the first layer, while red light with long wavelength permeates to the under layers. The screen has a number of potential applications, since it is easy to prepare, low cost, and applicable to a large area. One of promising candidates is, of course, in the application as 3D projection screen. This is because 2D images projected on the screen can be automatically transformed into 3D images with a stereoscopic background. And considering that this system is applicable to not only reflection type but also transmission type, one of interesting candidates is for use in pseudo windows. By connecting an external camera, the screen can be utilized as a pseudo window on a real wall. The pseudo window can be expected to provide an open feeling while keeping high heat insulation, sound insulation, and privacy. Keywords: Projection Screen, 3D image, Human skin, Pseudo Window
Education is the way to develop the skill of ability of human resources. Today, technology develop very fast, all information network channel also develop too. Technology could not be caught but possible to learn. Education must be develop in the same way of technology, upgrade curriculum, upgrade the lecture and upgrade the knowledge related with this field. In this research, we will figure out how importance the education and science knowledge is in this Industry related the development of information technology. In the past, worked based on experience and learned by doing still possible, because technology still conventional. Today, technology making revolutionary, all changed. It driven the industry and push the development on the industry. Today, Indonesian printing industry standardization compare with other country in South East Asia, it still under minimum standard of them. Other country in south East Asia like Thailand, they make revolutionary change since 12 years ago. Their government sent all education staff and member study abroad until graduated, and then contract them to develop it in Thailand. Singapore, Malaysia, Vietnam then Philippines also do the same thing. Based on that view, it gives as a picture if education is important in any sectors. In this discussion we focused on Printing Industry. What is printing? Printing is kind of technique to send any message, idea, information, through hardcopy which made by print process. How to make the printing result for end user in best quality, we will discuss how important on it. All human being in the world use all printing product from invitation, book, newspaper, magazine, packaging, media promotion, etc. People from this industry lead the process in order the printing product satisfied and high quality. In the printing house side, expert people in this area will have them to make all the process efficient and effective. Keywords: Printing, Science Knowledge, Information Technology
Waste management is one of the biggest environmental issues faced by printing industry today.This paper investigates and characterizes all waste materials in Chulalongkorn University Printing House (CU Printing House) , Bangkok, Thailand. This research selects CU Printing House as a case study, which represents a small and medium scale of printing house. All wastes materials in the CU Printing House were segregated and classified into non-hazardous waste and hazardous waste. Waste code was applied and coded according to the Industrial Work Department, Ministry of Industry, Thailand. We conducted a waste audit and measured the amount and type of wastes which were generated, then work out how these could be minimised. This paper presents an example of waste characterization of CU printing house. Waste management strategy i.e. waste audit and waste code were applied for all wastes generated. The amount of wastes and type of wastes were also reported. This study proposed a guideline for good waste management applies to CU Printing House. Keywords: Waste management, waste code, printing house, recycle, non-hazardous waste, hazardous waste
This paper explains how the evaluation of letter contents and the personality of the senders vary according to presentation media and document styles of letters. We conducted a two-way factorial design experiment. The first factor was presentation media: paper and electronic media. The second factor was document styles: mails with a Gothic font, postcards written in a Mincho font, postcards written in a handwriting-like font, and handwritten postcards. It was observed that presentation media strongly affect the evaluation of the personality of the senders. Sending paper letters improves the feeling of familiarity between recipients and senders. Next, the document styles strongly affect evaluation of the contents of letters. Handwritten letters improves the evaluation of letter contents. Finally, the feeling of appreciation is highly evaluated in handwritten letters on paper. Based on the result, we discuss how to select presentation media and document styles depending on situations.