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Volume 47, Issue 1
Displaying 1-6 of 6 articles from this issue
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Kenji HARADA, Keiichi TANAKA, Hideo KOMIDZU1984 Volume 47 Issue 1 Pages 1-5
Published: February 28, 1984
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSPd (NH3) 4 [B (C6H5) 4] 2 was found to have photothermographic property. Its application to photographic system was studied by measuring the photographic sensitivity, the spectral sensitivity and the amplification factor and activation energy of thermal development. It was shown that this compound had fairly large photosensitivity in the wavelength range between 210 and 350 nm. The photographic sensitivity represented as the light energy required to produce D=0.1 above fog is 3×105 erg/cm2 at 310 nm. The thermal developability is nearly half as large as those of dioxalatopalladium salt and oxalatodiaminopalladium studied in our previous paper, with an amplification factor of 30. This compound is fairly stable while kept in the dark at room temperature, as compared with other palladium compounds such as cited above.View full abstractDownload PDF (620K) -
Kenichi KUGE, Ryo HIROHASHI1984 Volume 47 Issue 1 Pages 6-13
Published: February 28, 1984
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSKinetics of the delayed formation of latent image specks in vacuum was studied. It was assumed that the reaction of delayed formation of developable specks was the agglutination of one single silver atom species and one latent sub-image speck in a grain, and a theoretical equation for the increase with time of the fraction of developable grains was derived by use of the stochastic process theory as follows.
_??_Here, P is the fraction of developable grains, t is the time of storing in vacuum after exposure, P0 is the P value at t=0, l and m are the number of single silver atom species and latent sub-image specks in a grain respectively, ΔPl, m is the fraction of grains which have l single silver atom species and m latent sub-image specks, and k1, 1 is the reaction probability per unit time in such a grain that has one single silver atom species and one latent sub-image speck. The equation indicates that the reaction rate is larger when there are more silver specks in a grain. The experimental result was that the rate of increase of P was larger with larger exposures and at higher intensities. This is explained well by the above equation. The reaction probabilities k1, 1 at high and low intensities were almost the same and were estimated at 0.10-0.11min-1.View full abstractDownload PDF (1030K) -
Yoshio SEOKA1984 Volume 47 Issue 1 Pages 14-17
Published: February 28, 1984
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe three-dimensional image stability space is introduced for evaluating the stability of color images in actual environments. Six typical conditions for storage or display of photographs are analyzed in terms of thermal (X-axis), brightness (Y-axis) and frequency (Z-axis) factors, the last of which corresponds to the frequency of the storage or dirplay conditions in Japan. The three-dimensional expression (X-Y-Z) is helpful to survey the situation of natural aging of photographs and reveal that accelerated aging tests are appropriate for the evaluation of dark and light stability.View full abstractDownload PDF (395K) -
Fading of the Color Printed Images Irradiated by a White Fluorescent LampTeruaki HISANAGA, Etsuo FUJII, Tadashi OINOUE, Toshio MIYAGAWA1984 Volume 47 Issue 1 Pages 18-25
Published: February 28, 1984
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThree kinds of color photographic papers were used for preparing the test patches (Y. C. M. & Gray), and the patches were irradiated with white fluorescent lamps of 8400lx for 46 days at 30°C, 75% RH as an accelerated light fading test.
The fading of the patches were evaluated according to the specification of color difference (ΔE*) of CIE 1976 (L*a*b*) space [CIELAB], and also the change of ΔE* was discussed compared with the change of color density.
The test paches showed the characteristic fading, and the fading comprised of discoloration and color fading was cleared by the specifications of ΔE* and the analysis of ΔE* to ΔH, ΔC and ΔL.
The fading proceeded rapidly at very initial irradiation period (1-4 days), and it was restored once and then the fading proceeded gradually again according to increase of irradiation time.
From the results of these characteristic fading, it is considered that the fading proceeds with complex mechanism.
The effect of yellow stein on the fading was observed, and the content of the yellowing was cleared from the analysis of the fading by ΔE* specification method.View full abstractDownload PDF (2855K) -
BI-XIAN Peng, YAN-BIN Peng, ZHEN-XING Li, XUE-HAN Wu, RONG-QIN Wang, S ...1984 Volume 47 Issue 1 Pages 26-35
Published: February 28, 1984
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe photographic emulsion which consists of conductive silver halide microcrystals embeded in isolating gelatin can be regarded as a heterogeneous medium showing the interface polarization called the Maxwell-Wagner effect. The effects of various measuring conditions, such as gelatin type, degassing degree, moisture content upon the ionic conductivity of emulsion microcrystals have been studied with the aid of dielectric loss method. The change of dielectric loss of photographic emulsions versus frequency was determined as a function of raw material quality, iodide content, the addition of various chemical sensitizers and the addition of different stabilizers. From these measurements, ionic conductivity and in some cases, the space charge characteristics of a series of silver halide emulsion microcrystals are presented and discussed.View full abstractDownload PDF (1136K) -
Iwao OHISHI1984 Volume 47 Issue 1 Pages 36-45
Published: February 28, 1984
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSDownload PDF (1370K)
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