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Volume 26, Issue 1
Displaying 1-5 of 5 articles from this issue
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Industrialization in the Print SystemsShigeru WATANABE1989 Volume 26 Issue 1 Pages 3-17
Published: January 31, 1989
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSIndustrialization of the Printing Systems means the standardization in the row material, production process and the method of inspection and testing. And the concept of guarantee of the quality in each process and products is essential. Many printers have searched some new enterprise to expand their business with applying their printing technology, that can be mainly classified into two following categories. The one is “optical technology”. Etching technology for shadow-masks is one of examples. The other one is the application of printing itself. In this term, “printing machine” is considered as “coating machine” to print a large number of the same patterns with functional inks. There are some evaluation methods when printing thechnology is applied for industrial purposes. 1. Comparison kinds of a various of printing methods for a specific purpose. 2. Physical or psyco-physical evaluation of line image structure. 3. Measurement of chemical and physical properties of functional inks. This paper describes these evaluation methods based on technical and quantitative for industrial application of printing to the production of micro color filters for LC-TV (Liquid Crystal Television) as an example.View full abstractDownload PDF (2244K) -
Effects of Blanket Properties and Printing Conditions on SlurYoshio IWASAKI, Hisao OKADA, Yasusuke TAKAHASHI, Yoshitaka YAMAMOTO1989 Volume 26 Issue 1 Pages 18-30
Published: January 31, 1989
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSThe test offset printing blankets of two types, which are one group having same properties except surface roughness, and other group of different compressibility blankets with the identical surface rubber layer and surface roughness were prepared. The effects of the surface roughness and compressibility of blanket and printing conditions on slur in offset printing were studied. It was found that slur is due to the partial microslip caused by the difference of peripheral velocity between plate cylinder and blanket cylinder, and ink layer acts just like a lubricant, so that the microslip is forwarded by thicker ink layer. The surface roughness of blanket affects on the irregularity of the fringe of the printed ink image, which is caused by the sharp micro-concave existing in the blanket surface. The dynamic deformation of blanket at the printing nip was visually evaluated with high speed video system. It was found that the top surface rubber layer and the intermediate sponge layer are compressed much more than other layers in multi-layered blanket structure. It is thought that the thickness and modulus of both surface rubber layer and sponge layer have much more influence on slur than the total compressibility of blanket.View full abstractDownload PDF (3364K) -
Satoshi IMAHASHI, Toshihiko KAJIMA, Shigeo TAKENAKA1989 Volume 26 Issue 1 Pages 31-37
Published: January 31, 1989
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSPhotopolymerization is commonly applied to printing plate, dry film resist, non-silver lith film and so on. Their photosensitive characteristics depend upon a lot of factors, e. g. composition of photosensitive layer, compatibility of its constituents and film forming method. The effect of film forming method on the photosensitive characteristics of the photopolymerization type non-silver lith film the photosensitive layer of which contained dispersed carbon black was investigated. Its sensitivility and γ value depend upon the drying condition such as drying temperature and the direction of hot blast in the drier. It was found that the vertical concentration distribution of crosslinking agent and sensitizer which strongly affect on the sensitivity and which are mobile in the photosensitive layer was effected by the drying condition. Furthermore, we discovered that there was a good correlation between their vertical concentration distribution and sensitivity and γ value. Namely, the variation of photosensitive characteristics of non-silver lith film by the drying condition is ascribed to the difference of the vertical sensitivity distribution in the photosensitive layer. This conclusion was confirmed by simulation method.View full abstractDownload PDF (898K) -
Hiroaki KOTERA1989 Volume 26 Issue 1 Pages 38-49
Published: January 31, 1989
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSDownload PDF (3406K) -
Basic Course (1) The History of Color TheoryToshio ICHIMI1989 Volume 26 Issue 1 Pages 50-57
Published: January 31, 1989
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSEvidence indicates that the first color theorists were ancient Greek philosophers who believed that color was created by a mixture of soil, water, fire and wind. Color study continued slowly until the 17th century when Newton, based on his investigation of optics, advocated that the light spectrum was the origin of color. Research by scientists Young and Helmhotz in the early 1800's led to an understanding of the mechanism by which eyes perceive color. Later, Maxwell's successful experiments with the additive mixture of color stimuli led to the development of four color printing.View full abstractDownload PDF (1580K)
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