著者

竹原 悟

出版者

The Japanese Society of Printing Science and Technology

雑誌

日本印刷学会論文集 (ISSN:00400874)

巻号頁・発行日

vol.6, no.14, pp.76-81, 1963-10-15 (Released:2010-09-27)

参考文献数

6

---

I have studied fiber structure and measured fiber length distribution of nine kinds of stereo flong which are on the market. In the last analysis, it was found that these pulp structure was only B. SP or mixture of B. SP Mean fiber length was 0.8-1.1mm, and the maximum frequency of fiber length was 0.6-0.8mm.In addition, I have made a preliminaly experiment on the interrelationship of viscoelasticity and plasticity of them. Visco-elastic properties were measured by vibrating reed method. Obtained results are considerable agreement between dynamic elasticity and plasticity of the flong, and between internal time scale and plasticity of the flong.

著者

畑 幸徳

出版者

The Japanese Society of Printing Science and Technology

雑誌

日本印刷学会論文集 (ISSN:00400874)

巻号頁・発行日

vol.8, no.22, pp.73-79, 1965-12-01 (Released:2010-09-27)

著者

三品 博達 田中 恒雄

出版者

社団法人 日本印刷学会

雑誌

日本印刷学会論文集 (ISSN:00400874)

巻号頁・発行日

vol.21, no.1, pp.13-21, 1983

---

A New image modulation process for printing by means of laser speckle pattern is proposed and analysed theoretically by standing on optical and staitistical base. In this method, image plane laser speckle pattern is used for the modulation in a platemaking process instead of usual contact or glass screesn. It can be shown that the characteristics of image modulation in this process are closely related to the first order statistics of laser speckle which represent the intensity probability distribution function.<br>By considering the platemaking and printing process, the relation between the density of the original and printed image is obtained for various surface roughness and different parameters of optical system. As the results, the widest and most linear reproduction curve is given when the speckle pattern having the contrast value of 0.5 is used for image modulation. The screen range of speckle modulation depends strongly on the ratio of the threshold level of the sensitized plate to the average intensity level of the speckle pattern.