Journal of The Society of Photographic Science and Technology of Japan

Progress of Silver Halide Printing-out Photosensitive Materials

On the Light-developable Printing-out Materials

Shinobu KOREMATSU, Hidemaru SAKAI

1968 Volume 31 Issue 4 Pages 181-188
Published: January 25, 1969
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11454/photogrst1964.31.181

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A Review on the Progress of Silver Halide Printing-out Photosensitive Materials for Lightdevelopable Type.

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Adsorption of Silver Ion on Silver Chloride Precipitate and Its Influence on Electrical and Photochemical Properties of the Precipitate

Mikio TAMURA, Toshio TANAKA, Eiji KANADA

1968 Volume 31 Issue 4 Pages 189-193
Published: January 25, 1969
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11454/photogrst1964.31.189

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Amount of silver ion adsorbed on gelatin-free silver chloride precipitate has been determined and the electrical conductivity and the rate of photolysis of the precipitate measured, to know to what extent the adsorbed silver ion influences the electrical and photochemical properties of the precipitate. The maximum number of adsorbed silver ions was estimated to be only about 15% that of surface lattice silver ions of the precipitate. The electrical conductivity of the precipitate decreased, and the rate of photolysis remained almost unchanged, when the precipitate was treated with solutions containing silver ions. These facts suggest that the adsorbed silver ion does not have a larger mobility, and is not a deeper trap for photoelectrons, than the surface lattice silver ion.

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Analytical Study of Photographic Characteristics Based on the Observation of Ultra-thin Cross-section of Emulsion Layer.(V)

On the Measurement of the Effcective Specific Gravity of Developed Silver Grain

Hidesaburo GENDA, Tomiya SAKAGUCHI

1968 Volume 31 Issue 4 Pages 194-203
Published: January 25, 1969
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11454/photogrst1964.31.194

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On this thesis, author have tried to determine effective specific gravity (ρ) of developed silver grains dispersed in developed emulsion layer.
The relationship between the mass of developed silver per unit area (M), the number of developed silver grains per unit area (N), the developed grain volume (υ), and the effective specific gravity of developed silver grain (ρ) are indicated theoretically by next equation.
M=N·υ·ρ
The mass of developed silver were determined by potentiometric titration. The number of developed silver grain per unit area, the developed grains size frequency distribution and the average grain diameter were calcurated by the newly developed counting method based on the electronmicroscopical observation of developed layer cross-section.
The volume of developed grain were calcurated from the above mentioned grain size frequency distribution histogram by approximating grain shape as sphere.
Hence we can calcurate the effective specific gravity by substitute these three values (M, N, and υ) in above equation.
On this experiment, we have used Neopan-F 120 film as experimental material and fixed developing conditions as follows, D-76; 20°C; 14 min., and D-72 (1: 2); 20°C; 5 min.
Determined each average effective specific gravity ρ_D-76 and ρ_D-72 were 1.539 and 1.10, respectively, and in the case of solution physical development concerning with ordinary chemical development just as D-76, the values of ρ are generally higher than D-72 (1: 2) and gradually decrease with increasing D, on the contrary in the case of mainly chemical development is occuring as D-72, the values of ρ are almost constant and does not change with D.
Interrelations between D, N, M, d and ρ of a bove mentioned experimental conditions are showed and discussed, too.

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Adsorption of 2, 2'-Cyanine Dyes on Silver Bromide

Hideo MATSUSAKI, Hiroshi HADA, Mikio TAMURA

1968 Volume 31 Issue 4 Pages 204-208
Published: January 25, 1969
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11454/photogrst1964.31.204

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Adsorption isotherms and reflectance spectra of four different 2, 2'-cyanine dyes have been obtained for silver bromide grains of a known specific surface area. 1, 1'-diethyl-2, 2'-cyanine bromide having the shortest methine chain shows the J-band at high coverage of the dye on silver bromide surface. On the other hand the other three 2, 2'-cyanine dyes show the the H-band at high coverage.

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Granularity of Photographic Image (II)

Wiener Spectrum at a Constant Density Level with Various Exposure and Time of Development

Masao TAKANO

1968 Volume 31 Issue 4 Pages 209-214
Published: January 25, 1969
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11454/photogrst1964.31.209

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In the previous paper (Part 1), the author and other reported on the relation between Wiener spectrum and granularity of the developed silver images. In the present paper, granularity of a photographic film at various developing time and amount of exposure was studied from the viewpoint of the Wiener spectrum.
Wiener spectrum was determined for a negative film of high sensitivity and four kinds of developer by means of a high speed scanning microphotometer and a frequency analyzer. The spectrum level, and expected mottle size calculated from the Wiener spectrum increased proportionally to photographic density. Among the combinations of exposure time and developing time to give equal density, the spectrum level and expected mottle size was greater for higher exposure and shorter developing time.

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Granularity of Photographic Image (III)

Granularity of Photographic Color Film and Wiener Spectrum

Masao TAKANO

1968 Volume 31 Issue 4 Pages 215-220
Published: January 25, 1969
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11454/photogrst1964.31.215

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In the previous work, Wiener Spectrum of developed black and white silver image has been studied in relation to developing time. The present paper deals with Wiener spectra for photographic images formed at various stages of reversal color processing, and they are:(1) negative silver image formed by first development, (2) reversal silver image and (3) color image formed by color development.
Result showed that the behaviour of silver images was similar to that reported in the previous paper. As to the color image, some difference appeared according to the nature of couplers which have different reaction speed of coupling. Color image formed by a coupler with highest coupling speed showed higher spectrum level F (0, 0) and greater expected mottle size with increasing density, but bandwidth of Wiener spectrum decreased. For coupler of low coupling speed, spectrum level F (10, 0) and expected mottle size showed a maximum the density of 0.7-1.0.
Granurality of photographic reversal color film is greatly dependent on coupling speed of coupler as well as on silver halide grain size and developing conditions.

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[title in Japanese]

[in Japanese]

1968 Volume 31 Issue 4 Pages 221-223
Published: January 25, 1969
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11454/photogrst1964.31.221

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