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Volume 34 (1971)
- Issue 4 Pages 197-
- Issue 3 Pages 135-
- Issue 2 Pages 65-
- Issue 1 Pages 1-
Volume 34, Issue 3
Displaying 1-6 of 6 articles from this issue
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Akio ARAKI1971 Volume 34 Issue 3 Pages 135-153
Published: September 30, 1971
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSExposure mechanisms of a camera have been rapidly developped after the war.
The original type of this exposure adjustment mechanisms of the camera was Semi Automatic Type (manual adjustment mechanisms by means of linking mechanisms in accordance with the indication of exposuremeter).
And Automatic Type of exposure adjustment mechanisms called E.E.(Electric Eye) appeared.
Now Electric Shutter Camera is the most popular.
Further more the electric shutter camera with a flash photographic apparatous is popular as Full Automatic Camera.
This paper reports technical tendency of exposure adjustment of camera in Japanese patent and/or utility model publications with their statistical graphs and examples.View full abstractDownload PDF (2349K) -
Akihiko MIYAMOTO1971 Volume 34 Issue 3 Pages 154-158
Published: September 30, 1971
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSAn antistain agent for color photography, 2, 5-di-t-octylhydroquinone (DOHQ), bas been known to cause light fading of the cyan dye image when incorporated in color film. This light fading mechanism was investigated.
A part of DOHQ in color film is oxidized to 2, 5-di-t-octyl-p-benzoquinone (DOQ) on the bleaching process during color processing, so that DOHQ and DOQ are coexistent in the dye image.
DOHQ reduces cyan dye to leuco form even in the dark. This reduction is restrained in the presence of DOQ, probably because the redox potential becomes more positive.
On the other hand, DOQ does not react with cyan dye in the dark. By the irradiation of light, however, it reduces cyan dye to leuco form though it is regarded as an oxidizing agent.
Then, a photochemical reaction of DOQ itself was studied in ethyl acetate solution. DOQ is unstable against light. By thin layer chromatographic experiment, at least four products were detected in the irradiated solution. One of them acts as a reducing agent and reduces cyan dye to leuce form.
From these results it is concluded that the cyan dye image containing DOHQ and DOQ is faded by two mechanisms that, by the irradiation of light, DOQ in the image is changed into a reducing agent, which in turn reduces cyan dye to leuce form, and that DOHQ can also reduces cyan dye to leuco form, as DOQ is removed by the irradiation of light.View full abstractDownload PDF (544K) -
Keiichi TANAKA1971 Volume 34 Issue 3 Pages 159-163
Published: September 30, 1971
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe amount of absorbed gold (III) ion or palladium (II) ion on silver bromide powder was determined by the analysis of the metal ion in solution after some fixed times. Adsorption of palladium (II) ion on silver bromide reached equilibrium immediately after it's addition. On the other hand, the adsorption amount of gold (III) ion increased with the aging time. Addition of thiocyanate increased the adsorption of palladium (II) ion on silver bromide.
Isoelectric point of the gelatin was pH 4.9, which was determined by the electrophoresis of the gelatin-silver bromide sol.
Electrophoretic mobility of silver bromide sol and that of gelatin-silver bromide sol with palladium (II) and gold (III) ion were measured. It was shown that gold (III) ion could change the sign of the charge of the sol at lower concentration than palladium (II) ion, and palladium ion (II) had the binding affinity with gelatin on the acid side of the isoelectric point (at pH 3.4).
Spectrophotometry of palladium thiocyanate-gelatin solution also showed that palladium (II) ion was bound by gelatin.View full abstractDownload PDF (590K) -
Penetration Rate of Developing Agents under Diffusion-controlled DevelopmentHaruhiko IWANO1971 Volume 34 Issue 3 Pages 164-171
Published: September 30, 1971
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe penetration of developing agents through emulsion layers under diffusion-controlled development was investigated with the test emulsions of various AgX/gelatin ratioes, halide compositions and degree of hardening.
The distance of penetration was, in most cases, proportional to the square root of developing time. A good coincidence of observed penetration rate with the equation derived from Fick's law was found for hydroquinone development of hardened emulsions, but, for unhardened emulsions, the coincidence was observed only in a limited range. Metol was less diffusion-controlled than hydroquinone.
The limit of wet processing rate was discussed from the results.View full abstractDownload PDF (3506K) -
Seiichi DENDA1971 Volume 34 Issue 3 Pages 172-179
Published: September 30, 1971
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSPresent status of fine pattern technology in the field of microelectronics is described. Requirment from LSI memory to photo engraving technique is given. Some practical points in integrated circuit fabrication and precausion in connection with the fine pattern are discussed.View full abstractDownload PDF (13246K) -
1971 Volume 34 Issue 3 Pages plate1
Published: September 30, 1971
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSDownload PDF (2573K)
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