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Volume 36 (1973)
- Issue 6 Pages 339-
- Issue 5 Pages 271-
- Issue 4 Pages 219-
- Issue 3 Pages 153-
- Issue 2 Pages 73-
- Issue 1 Pages 5-
Volume 36, Issue 4
Displaying 1-6 of 6 articles from this issue
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Ichiro MATSUMOTO1973 Volume 36 Issue 4 Pages 219-222
Published: July 31, 1973
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe color prints for the advertising use will be produced by three work groups. 1st Logical step
They, AD desk, Reserchmen, Planner, Co-ordinator of businees section, are find out their appeal points and sales points between the consumer's needs and their product's merits. 2nd Creative step
They, Art director, Photographer, Designer, Copy writer and the others are fix up with the conception to the visual image. They are employing the human factors not only the logical conception but the sense of artist.
3rd Tecnical control step
The printing stuff are realize the request from the creative menbers. There are only the problem about printing techniques. The most important point is the treating about the data of image. How the mental image will be appeared as the dot image. So this shows some points in these prosessing.View full abstractDownload PDF (610K) -
Dissolution of Silver Halide Macrocrystals in Thiocyanate Salt SolutionMasami KAWASAKI1973 Volume 36 Issue 4 Pages 223-231
Published: July 31, 1973
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSProcesses of dissolution of developed silver particles and of silver halide macrocrystals by the treatment with thiocyanate salt solution were studied.
The dissolution of the developed silver particles increased with raising concentration and temperature of thiocyanate fixing solutions.
The reducing ratio of the photographic density of a film treated in 24 hours and that treated in ten minutes was 1: 2 in the case of 2N thiocyanate solution of 20°C. The reducing effect was larger in acid side (pH 3) than in alkali side (pH 8).
Crystals of silver thiocyanate were deposited on the surface of silver halide macrocrystals during the first stage of fixing process. These crystal forms differed according to the kinds of anion such as NH4+, Li+, and Mg++.
Growth direction of the silver thiocyanate crystals were in parallel with the edges of the triangular or hexagonal silver halide macrocrystals.View full abstractDownload PDF (22311K) -
Tadaaki TANI1973 Volume 36 Issue 4 Pages 232-235
Published: July 31, 1973
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe reduction sensitization by use of SnCl2 depressed the desensitization by 3, 3'-diethyl-9-methylthiacarboayanine bromide (I) in the emulsions composed of the octahedral (about 0.65μ) and tabular (about 1.1μ on average) AgBr grains, whereas it accelerated the desensitization by I in the emulsions composed of the cubic (about 0.7μ) and small octahedral (about 0.25μ) AgBr grains. These results have been interpreted on the basis of the proposed mechanisms of the desensitization by dyes and the reduction sensitization dependent upon the nature of the grains.View full abstractDownload PDF (433K) -
(3) Spectral Color Matching by Minimax ApproximationNoboru OHTA, Hitoshi URABE1973 Volume 36 Issue 4 Pages 236-240
Published: July 31, 1973
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSA computer algorithm for spectral color matching has been developed by means of a minim ax approximation to approximate an absorption band by linear combination of several dyes. The minimax approximation always gives feasiale solutions and small errors than a least squares method. Suitable computer programs have been developed based on the linear programming theory for an IBM-1130 computer in FORTRAN IV language. Some practical approximations have been demonstrated for spectrally matching colors of human skin, blue sky, and nonselsctive gray of 50% luminous reflectance with twelve component dyee.View full abstractDownload PDF (603K) -
Michio MIYATA1973 Volume 36 Issue 4 Pages 241-242
Published: July 31, 1973
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe photographic sensitivity of AgBr crystals is attributed to the unstability of the disorders of lattice of AgBr crystals which are formed at emulsification. When light is absorbed in such disorders of lattice the silver and the bromide ions of disorders are made free from lattice energy, that is, ionized by the exciting due to photo energy. Such effects of photo energy are the free silver and bromide ions, and the electron and holes in which the former are observed as photo conductance, and the latter as photo electric effect. When AgI specks are present in the AgBr lattice the ionized bromide ions are absorbed thereby, and consequently, the ionized silver ions are converted into silver atoms by electrons. The formation of the disorders of lattice and intermixing of AgI specks into energy AgBr grain at emulsification are discussed.View full abstractDownload PDF (244K) -
Tetsuo YANO1973 Volume 36 Issue 4 Pages 243-250
Published: July 31, 1973
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSUsing double jet method and controlling pAg and pH values during emulsification and ripening, sizes, and shapes of silver halide crystals can be regulated. In order to eliminate soluble electrolytes in the emulsion, method of precipitation of silver halide and gelatine with sulphate at lower pH value, is now widely adopted. By means of vacuum evaporation or refregereation, emulsion can be concentrated. Progress of the techniques and devices in emulsion making, enables to produce various types of new photographic emulsions.View full abstractDownload PDF (4250K)
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