All issues
Volume 33 (1996)
- Issue 6 Pages 346-
- Issue 5 Pages 290-
- Issue 4 Pages 210-
- Issue 3 Pages 150-
- Issue 2 Pages 92-
- Issue 1 Pages 2-
Volume 33, Issue 4
Displaying 1-10 of 10 articles from this issue
- |<
- <
- 1
- >
- >|
-
Technical Prospects of the Computer-To-Plate SystemMasazumi TAKIZAWA1996 Volume 33 Issue 4 Pages 210-215
Published: July 31, 1996
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSThe digital prepress system has made rapid progress since the 1990's. Moreover, digital technology has advanced to make possible the Computer- To- Plate (CTP) System and many such systems have been announced at DRUPA 95. However, the present condition of the CTP System leaves much room for improvement. Hereafter, users must continue to strictly evaluate the functions and effects of the CTP System.View full abstractDownload PDF (1077K) -
The Structure of the Computer-To-Plate ImagesetterIsao TOKURA1996 Volume 33 Issue 4 Pages 216-221
Published: July 31, 1996
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSComputer-To-Plate imaging has given the impact on the graphic arts market in terms of saving an intermediate film step and transferring computer data to the remote output device easily through the communication line. Many Computer-To-Plate imaging devises were exhibited at DRUPA '95 held in Germany and are expected to be widely used this year. This paper describes the background of developing imagesetters at Dainippon Screen first and the various exposing methods are explained precisely from the viewpoint of the optical system. Also some consideration is given for the CTP imagesetter to become more popular in the future.View full abstractDownload PDF (1153K) -
Photopolymer Materials for Computer-To-Plate SystemKenichi KOSEKI1996 Volume 33 Issue 4 Pages 222-229
Published: July 31, 1996
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSIn recent years, the field of Computer-To-Plate (CTP) system has been remarkably developed. Some photopolymer type offset-printing plates for CTP system have been presented, The sensitivity of these plates is the order of 100μJ/cm2 for visible laser light such as Ar+ laser (488nm). Photoinitiator is the most important material in the composition of photopolymerization type printing plate. This paper describes the recent progress of the Ar+ laser sensitive initiator system for radical polymerization. He-Ne laser and near infrared laser sensitive photoinitiator system are also discussed.View full abstractDownload PDF (1234K) -
Computer-To-Plate based on Silver Halide Diffusion Transfer TechonologyAkio YOSHIDA1996 Volume 33 Issue 4 Pages 230-235
Published: July 31, 1996
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSAs computer technology is highly advanced in recent years, computer-to-plate is being introduced for practical use into the offset printing market. Computer-to-plate based on silver halide diffusion transfer technology is presented in this paper. The application of the silver halide diffusion transfer technology, the process of platemaking, the novel studies concerning the laser sensitive direct-to-plate, and the features of the silver halide computer-to-plate compared with the others are introduced.View full abstractDownload PDF (1357K) -
Silverhalide/Photopolymer-Hybrid Plate and other Printing MaterialsOsami TANABE1996 Volume 33 Issue 4 Pages 236-243
Published: July 31, 1996
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSThe silverhalide/photopolymer hybrid plate-making system, first introduced by FUJI PHOTO FILM Co., in 1980, is described, focusing on its benefits and drawbacks for a CTP-system. Some other remarkable printing plates and new systems are also discussed.View full abstractDownload PDF (2418K) -
Peisuei LEE, Tomoharu NAGAO1996 Volume 33 Issue 4 Pages 244-249
Published: July 31, 1996
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSA method to describe outlines of arbitrary two dimensional shapes is proposed in this paper. When a 2D shape is given as a silhouette, its structure is automatically approximated by the use of several rectangles. Sizes, positions and rotational angles of the rectangles which approximate adequately the given 2D shape are searched by a Genetic Algorithm; GA. GA is an effective optimizing algorithm derived from the idea of evolution of living things. By changing the total number of rectangles used for description, hierarchical description of 2D shapes is also achieved. This method can be applied to the field of artistic applications by the use of computers and to object recognition in the field of computer vision.View full abstractDownload PDF (1553K) -
Lihong CAO, Tomonori YUASA, Hiromichi MISHINA1996 Volume 33 Issue 4 Pages 250-256
Published: July 31, 1996
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSIn printing process, a skilled operator manipulating printing machine can infer the suitable adjusting point and value under the consideration to many parameters and the relations between them, such as the printing images on a sheet, properties of materials used in the system, and machine conditions. In this paper, we analyze the decision process for adjustment by experts and propose a structure of database in which the complete set of parameters and relations between them can be described as the integrating knowledge database. The database proposed here can be used for initial automatic machine starting-up and controlling system. Although the change in a parameter value in the system follows the succesive variation in related other parameters, the proposed system can find out whole affected parameters and also can drive each value for correction.View full abstractDownload PDF (867K) -
Kazuo FUTAMI, Tsuyoshi MORISHIMA, Toru OHASHI1996 Volume 33 Issue 4 Pages 257-260
Published: July 31, 1996
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSThe formation of hydrophilic siliceous film on copper surface by the electrolysis of potassium silicate solution was investigated in order to produce the lithographic printing plate where the electrodeposited siliceous film acts as a nonimage area. Siliceous films were electrodeposited on copper surface in various potassium silicate electrolytic solutions that differ in SiO2/K2O ratio (formula ratio: 2.1, 3.4, 3.9) and concentration (5-20%). Applied bath voltages were 3-10V. Ink receptivity of the electrodeposited films were evaluated and infrared spectra of the electrodeposited films were measured. The summary of the results is shown below. Hydrophilic siliceous films tend to be formed in the electrolytic solutions of high SiO2/K2O ratio and high concentration. For high SiO2/K2O ratio the films are cracked and tend to peel off. Printing test was made by using the copper plate surface on which siliceous film is electrodeposited as a non-image area.View full abstractDownload PDF (2318K) -
Objective Evaluation by Analytical MeasureHiromichi MISHINA1996 Volume 33 Issue 4 Pages 261-265
Published: July 31, 1996
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSThis paper gives a systematic scope of the image quality evaluation in entire process from image creation to press printing. The parameters are arranged in a hierarchical structure of printing process. The printing process are divided in concept, layout, image transformation, transport, reproduction, and forming. The explanations for analytical parameters are given in this paper. The statistical parameters will be stated in following paper.View full abstractDownload PDF (1039K) -
Inkjet Marking Technology -Principal Technologies for High Resolution and High Speed Printing-Masayuki MUTOH1996 Volume 33 Issue 4 Pages 266-273
Published: July 31, 1996
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSThe continuous flow inkjet printer is used as a digital color proofer in graphic arts. The jet with initial velocity of approximately 50m/s is formed through the nozzle with orifice diameter of 10μm under the pressure of 3-4MPa, and disintegrates synchronously to the stimulation of 1MHz frequency into successive droplets with a diameter of 15-20μm. The density information of image signal controls the number of droplets constructing the pixel by the Pulse-Width-Modulation of charging control signal, and makes variable size dots on the recording medium. The principal technologies to obtain high quality images with high speed are described.View full abstractDownload PDF (2427K)
- |<
- <
- 1
- >
- >|