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Volume 26, Issue 3
Displaying 1-9 of 9 articles from this issue
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Sven A. Rydholm1972 Volume 26 Issue 3 Pages 101-103
Published: March 01, 1972
Released on J-STAGE: November 10, 2009
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Kiyosi Mii, Humikazu Tateiwa1972 Volume 26 Issue 3 Pages 104-109
Published: March 01, 1972
Released on J-STAGE: November 10, 2009
JOURNAL FREE ACCESSThe study was done that by which of Bekk method and Chapman method, the testing methods for smoothness of paper, we could estimate more exactly the printing sharpness of news print paper. Results obtained were as follows. (1) Comparing the sample B which indicated low smoothness in Bekk method but high smoothness in Chapman method with the sample D which indicated high smoothness in Bekk method but low smoothness in Chapman method, it was recognized that the sample B was more exellent in the printing sharpness than the sample D. (2) The sample B had higher compressibility and lower density than the sample D, therefore it was supposed that the difference in the smoothness data between both methods was due to the difference in used pressure. (In Bekk method low pressure is used and in Chapman method high pressure is used.) However, even if we used as high pressure as Chapman method in Bekk method, we could not gain equivalent data to those in Chapman method. Consequantly, it seemed that the difference between data in both methods was not caused by the difference in force to press the specimen, but caused by the difference in the measuring principle of the used methods. (3) Through above mentioned, as to the testing method for smoothness in order to estimate the printing sharpness of news print paper, Chapman method was more suitable than Bekk method, at least on the printing conditions in authors' experiments.View full abstractDownload PDF (1115K) -
Akira Miyoshi1972 Volume 26 Issue 3 Pages 110-112
Published: March 01, 1972
Released on J-STAGE: November 10, 2009
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Part 4 Effects of Two Sideness of Base Paper on Penetration of Coatings and Coated Surface CharacteristicsTadahira Hamada1972 Volume 26 Issue 3 Pages 113-124
Published: March 01, 1972
Released on J-STAGE: November 10, 2009
JOURNAL FREE ACCESSIn order to study how two sideness of base paper affects the penetration of coatings and the surface characteristics of coated paper, the scanning electron microscopic observation was carried out on the surface of base paper, the fiber interface of coating layer, the surface of coated paper and the printed surface of coated paper, as well as the optical microscopic observation. Two different types of commercial uncoated paper were selected as the base paper. The one (A) had little amount of two sideness and the other (B) had a marked two sideness. These papers examined were manually coated with starch-latex-PVA binder. Results have been summerized as follows.(1) Either on the topside surfaces of base paper A and B or the wire side surface of base paper A, fibers were oriented at random. Therefore small interfiber pores were formed uniformly. When these surfaces were coated, coatings could penetrate slightly into these pores. As a result, the surface was fully covered by coatings and good ink receptability was attained.(2) On the wire side surface of base paper B, it was observed that bundles of fibers were aligned on the machine direction forming the pattern of wire mark. When the surface was coated, coatings penetrated deeply into the depressions between these fiber bundles and could not fully cover the surface. A number of barely covered fibers were obeserved on the surface, which privented theformation of continuous ink film on the printed surface.View full abstractDownload PDF (15915K) -
Adsorption Characteristics of Kraft Pulp Lignin on Activated CarbonHiroshi Kabeya, Toshiro Fujii, Takarasa Kubo, Yutaka Kinmra, Kohei Ura ...1972 Volume 26 Issue 3 Pages 125-130
Published: March 01, 1972
Released on J-STAGE: November 10, 2009
JOURNAL FREE ACCESSSome adsorption characteristics of kraft pulp lignin on activated carbon from aqueous solution were investigated for the evaluation of the method of pulp mill waste water treatment with activated carbon. The adsorption rate of lignin was very slow. The adsorption capacity was about 2 to 7% by weight in the range of lignin concentration from 1 to 40 ppm, and it increased regularly with increasing of hydrogen ion concentration in the range of pH from 7 to 11. The adsorbed lignin was not desorbed in distilled water. The results of this work show that the further investigations of the adsorption method should be valuable for the clarification and the reuse of pulp mill waste water.View full abstractDownload PDF (1880K) -
Robert M.Vadas, Robert Thompson1972 Volume 26 Issue 3 Pages 131-146
Published: March 01, 1972
Released on J-STAGE: May 07, 2010
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Kotohiko Yamamoto1972 Volume 26 Issue 3 Pages 147-151
Published: March 01, 1972
Released on J-STAGE: November 10, 2009
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[in Japanese]1972 Volume 26 Issue 3 Pages Preface1-Preface3
Published: March 01, 1972
Released on J-STAGE: November 10, 2009
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1972 Volume 26 Issue 3 Pages Preface14-Preface15
Published: March 01, 1972
Released on J-STAGE: November 10, 2009
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