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Volume 65, Issue 6
Displaying 1-7 of 7 articles from this issue
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Yuzo TODA, Fuyuhiko MORI, Jan BOUWSTRA2002 Volume 65 Issue 6 Pages 381-389
Published: October 25, 2002
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSFunctions of gelatin in imaging materials of present and future are overviewed. Chapter 1 reviews present technologies' state of the art and limitations. While main focus is put on photographic materials and their manufacturing, a brief glance was paid on new application areas. Chapter 2 discusses about future technologies around gelatin in imaging materials and their possibilities. A few novel aspects for gelatin are reviewed in this chapter, namely enzymatically hydrolyzed gelatins, bio-genetically synthesized recombinant gelatins, and chemically modified hybrid gelatins.View full abstractDownload PDF (2523K) -
Takashi NAOI2002 Volume 65 Issue 6 Pages 390-401
Published: October 25, 2002
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSI gave a description of photographic binder to improve the physical properties of gelatin films. Polymer blends have been widely used to improve physical properties which are inadequate in single polymer species. It is known that blending of two polymers causes phase seperation and interaction which has a significant effect for film propertise. Therfor the control of phase seperation and interaction in film is considered to be very important.View full abstractDownload PDF (2473K) -
Fumiyuki SHIBA, Shinichi KUNICHIKA, Masakazu SAWADA, Yusuke OKAWA, Tak ...2002 Volume 65 Issue 6 Pages 402-405
Published: October 25, 2002
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSMonodisperse AgCl emulsions were prepared with some inert limed-ossein gelatins to asses the influence of gelatin on the photographic characteristics during the preparation process. The sensitivity obtained from the conventional D-72 development was negatively correlated to the reducing power of gelatin at least among the tested gelatins. Gold latensification improved sensitivities of the emulsions and decreased degree of the negative correlation, although fog densities were increased. Also, influence of gelatin on surface and internal sensitivities were also evaluated.View full abstractDownload PDF (658K) -
Toshiaki TAKAHASHI2002 Volume 65 Issue 6 Pages 406-414
Published: October 25, 2002
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe hardenability of gelatin films has been investigated by measurement of swelling ratio, number of crosslinks and molecular weight distribution of sol fraction hardened gelatin films. The hardeners used were 2, 4-di-chloro-6-hydroxy-s-triadine and glutaraldehyde. The relationships between viscosity of original gelatin and swelling ratio, number of crosslinks and molecular weight distributions of sol fractions of gelatin films hardened in different concentrations of the above hardeners were studied. The following were suggested from the results.
(a) The stable hardening level of gelatin was controlled by concentration of hardener and was independent from type of gelatin.
(b) The hardenability of gelatin was independent from its row material or its manufacturing process, but the sol fraction of hardened gelatin film was dependent on viscosity (corresponding to average molecular weight) of gelatin which was related to its row material or its manufacturing process.View full abstractDownload PDF (1156K) -
Noriichi ITO2002 Volume 65 Issue 6 Pages 415-421
Published: October 25, 2002
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSIn this review, I outline and discuss the basic characteristics, the hardening behavior and the origin of sol fraction in gelatin. As the low molecular weight gelatin from into which common photographic gelatin is intentionally decomposed has almost the same range of molecular weight as sol fraction, its preparation method, basic characteristics and some applications to photosensitive materials are also reviewed.
The sol fraction originated from specific collagen chain has the unique physicochemical and photosensitive properties and influences the performance of photosensitive material. Its origin, detecting method and characteristics have been mainly investigated by Japanese researchers. The low molecular weight gelatin prepared not only by controlling molecular weight but also by chemical modification is also applied to improve the physicochemical and photosensitive characteristics of photoproducts. These studies of sol fraction and low molecular weight gelatin are becoming one of the important gelatin research fields. Especially low molecular weight gelatin with the designed control of molecular weight and chemical modification will continue to play an important roll as one of photosensitive materials.View full abstractDownload PDF (1281K) -
Kiyomitsu MINE2002 Volume 65 Issue 6 Pages 422-425
Published: October 25, 2002
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSSulfite in photographic gelatin is a microcomponent influencing photographic property. The determination methods of it have problems in selectivity and speed. The head-space FPD gas chromatography determination of sulfite in photographic gelatin was investigated. Selectivity and speed were improved. The detection limit of sulfite in photographic gelatin was 5ppm.View full abstractDownload PDF (516K) -
Takashi OHNO, Yuichi SAWAHATA, Yusuke OKAWA, Fumiyuki SHIBA, Toshio HO ...2002 Volume 65 Issue 6 Pages 426-428
Published: October 25, 2002
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSGelatins with differing molecular weight distributions were prepared by a water jet method. Dichromated gelatin (DCG) plates were then prepared with these different molecular weight distributions. It was clear that the difference in the molecular weight distribution of gelatin influenced the diffraction efficiency and SN ratio of a DCG hologram.View full abstractDownload PDF (384K)
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