巻号一覧
33 巻, 5 号
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滝本 靖之1971 年 33 巻 5 号 p. 259-266
発行日: 1971/03/25
公開日: 2011/08/11
ジャーナル フリーLight-sensitive resin systems are recieving increased attention owing to their broad application, in particular the printing industry.
Light-sensitive resin systems for application in the preparation of printing plate are reviewed.
The system are composed from (1) a light-sensitive group can be attached to a reactive polymer substrate, (2) a light-sensitive difunctional additive can be added to a polymeric substrate.
Whether the exposed area become insoluble or soluble, the systems are ref ered to as negative or positive resists. Light-sensitive systems for negative resists are composed from diazo containing, diazide containing compositions, or poly-vinyl cinnamates, for positive resists diazo quinone containing compositions are known. Also relief imagesare was produced from photopolymerizable acrylic containing compositions.
These resists and reliefimages are produced through photodecomposition, photocrosslinking (photodimerization), or photopolymerization.抄録全体を表示PDF形式でダウンロード (981K) -
谷 忠昭1971 年 33 巻 5 号 p. 267-271
発行日: 1971/03/25
公開日: 2011/08/11
ジャーナル フリーAs part of the investigation of the photographic actions of cyanine dyes, quantum-chemical studies have been made of the effect of substituents on the sensitizing power of N-phenyl-benzimidacarbocyanine (I) by using HMO method. HMO calculations have indicated that the lowest vacant electronic energy level siv of N-(o-substituted) phenyl-I and N-(p-substituted) phenyl-I (II and III resp.) are higher by 0-0.3 eV shan that of I, and that siv of N-(m-substituted) phenyl-I (IV) is nearly equal to that of I. This tendency increases with decreasing the electronegativity of substituents and with decreasing the C-R bond length, where R is a substituent. In the lowest vacant orbital, the nature of C-R bond is antibonding. Therefore, the more electron cloud gathers at C-R bond, the higher (the more unstable) the lowest vacant level is. On the contrary to the prediction by Neunhoeffer and keiler, there is no correlation between positive charge at N atom and sensitizing power of dyes. The observation by Neunhoeffer and Keiler that II and III have stronger sensitizing power than I and IV has been explained by the result that sty of II and III are higher than those of I and IV.抄録全体を表示PDF形式でダウンロード (548K) -
近赤外光によるClearing Timeの測定三位 信夫, 水沢 伸也, 笹井 明1971 年 33 巻 5 号 p. 272-278
発行日: 1971/03/25
公開日: 2011/08/11
ジャーナル フリーMeasurements of the film-clearing time in practical monobaths with near infrared ray to which most of conventional photographic materials are not sensitive were performed, and the dependence of film-clearing time on pH was investigated.
After trials of several experiments, the automatic film-clearing recorder has been assembled with a near infrared source, a water-jacket cell, a Ag-0-Cs photo tube, an amplifier and a recorder. The filmclearing time in a P-Q monobath is changed remarkably by alterations in pH, and it occurs by the presence of developing agents. Developing agents slow down the rate of fixing in monobaths below pH 11, and don't change above pH 11.抄録全体を表示PDF形式でダウンロード (2881K) -
久保 走一, 湯浅 良男1971 年 33 巻 5 号 p. 279-284
発行日: 1971/03/25
公開日: 2011/08/11
ジャーナル フリーGenerally, the level of exposure and color correction in color printing device is determined based on the evaluation about the tricolor full frame transmittance of color negative. In such evaluation the transmittance is measured as an arithmetic average which is depend on the low density area of color negative and is not correspond to the reasonable density level of color positive. Highlight and midtone densities of color print will be attract attention for observer in visual evaluation, therefor the correct information for color printing should be obtained from reasonable color negative density measurement which is corresponding to such positive densities.
To obtaine the correct information for determining the color correction based on the reasonable density level of color negative, it is necessary to express the correction factor in terms of coefficient of the exponent and apply it to the transmittance values measured from color negative which is divided into appropriate numbers in area.
In the present paper, authors try to bring forward a method to give the correct information of the exposure and of the color correction in color negative-positive printing device based on the above point of view.抄録全体を表示PDF形式でダウンロード (719K) -
直接光分解鋤柄 光則, 本多 健一, 宗像 誠二, 菊池 真一1971 年 33 巻 5 号 p. 285-288
発行日: 1971/03/25
公開日: 2011/08/11
ジャーナル フリーQuantitative study of the Photodecomposition of p-XC6H4CON3 (X=H, F, Cl, Br, I) is reported. The heavy atom substitution did not change significantly the quantum yield of the photodecomposition. Quantum yield of the photodecomposition of p-iodobenzoylazide in an isopropanol solution was different from that in an cyclohexane solution, though the activation energy of the reaction in the both solutions were approximately same. The photodecomposition was considered to occur through the following reaction path: ArCON3 (Sπ-π*)→Sn-π*→Tn-π*Tπ-π*ArCON:(T) +N2 (S), where, by the presence of the singlet and triplet n-π* states between the two π-π* states, conversion of ArCON3 (Sπ-π*) to the Tπ-π* state can occur very rapidly.抄録全体を表示PDF形式でダウンロード (479K)
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