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Takao Abe
2004 Volume 67 Issue Suppliment2 Pages
8-11
Published: November 16, 2004
Released on J-STAGE: August 11, 2011
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Thermal dye transfer prints and dye ink jet prints have the potential to be superior to silver halide photography in respect of color reproduction. It is very difficult for each digital color printing system to simultaneously achieve excellence in tone reproduction, high resolution, and high optical density. This paper describes the quest for the optimal level in digital color prints and printing systems.
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Ryuichi Iwasaki, [in Japanese]
2004 Volume 67 Issue Suppliment2 Pages
12-13
Published: November 16, 2004
Released on J-STAGE: August 11, 2011
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The correction technology of dusts and scratches effects is strongly desired on photo finishing equipments because of the difficulty of avoiding then. Recently the digital technology has been introduced into the photo finishing equipments and it allows us to remove the effects of dusts and scratches effects. In this study, we will show the basic theories of them and confirm the validity of the technology by some application results.
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Takeshi Makita, Hiroshi Tajika
2004 Volume 67 Issue Suppliment2 Pages
14-15
Published: November 16, 2004
Released on J-STAGE: August 11, 2011
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The ultimate photo printer for professionals and advanced armatures that want the highest image quality at all times. PIXUS iP8600 provides us for ChromaPLUS 8-color ink system, microscopic 2 pl droplets and the fastest photo printing. Features the total of Chroma PLUS 8-color ink system with additional Red ink and Green ink. Addition of Red and Green inks successfully enables a wide color gamut cannot be offered by conventional 6-color ink system or multi-color ink systems.
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[in Japanese]
2004 Volume 67 Issue Suppliment2 Pages
16-17
Published: November 16, 2004
Released on J-STAGE: August 11, 2011
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In 1935 modern color photography was born when Dr. W. Schneider at Filmfabrik Wolfen (Agfa) invented ballasted coupler to materialize Dr. R. Fischer's original concept (1912) for multi-layered photographic materials based on chromogenic development. The factors that conditioned the invention are discussed.
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Akira Kaneko, Sadanobu Shuto, Naoya Shibata, Kiyohito Takada
2004 Volume 67 Issue Suppliment2 Pages
18-19
Published: November 16, 2004
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We have developed a new high quality photographic printing paper designed for wide format digital printers. We introduce the design and technologies of high quality digital photographic printing paper, high D-max, better text quality, purer whiteness, and wide color reproduction, which are included in this material.
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Shigeru Shibayama, Tatsuya Ishizaka, Naoto Ohshima
2004 Volume 67 Issue Suppliment2 Pages
20-21
Published: November 16, 2004
Released on J-STAGE: August 11, 2011
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In order to evolve the digital minilab systems further, performances required for color paper are enhanced digital image quality and rapid processing suitability. The subjects imposed on silver halide emulsion for color paper are to make contrast moderately high for high-intensity exposure, to sensitize smaller emulsion grains effectively and for grains to adsorb hydrophilic sensitizing dyes tightly. The development of dopants, whose electron-releasing time is less than 1 sec, are especially important in order to improve high intensity reciprocity law failure of silver chloride emulsion. The modification of surface structure of silver chloride emulsion grains with iodide ions is effective for both increase in sensitivity of the emulsion containing smaller grains and tight adsorption of hydrophilic sensitizing dyes to the grains.
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Yasuhiro MIYAUCHI
2004 Volume 67 Issue Suppliment2 Pages
22-24
Published: November 16, 2004
Released on J-STAGE: August 11, 2011
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Offset printing is one of the mass production method for duplicating photographs. Usually offset printing is performed at around 2001pi., and the printing at larger number of lines is called the highly fine printing. In this paper, our highly fine printing is introduced and the highly-value-added printing in the future is described.
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An Expression on Hand-Woven Japanese Paper
Sumio NISHIMURA
2004 Volume 67 Issue Suppliment2 Pages
25-26
Published: November 16, 2004
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Benrido collotype factory was established in 1905 (38th year of the Meiji era). Benrido inimitably developed color collotype technique in the mid 60s, which has been utilized for the replication of cultural assets such as national treasures or important cultural properties. Nowadays, while digital printing or platinum printing is talked about as a method of photograph expression, collotype is newly drawing remarkable attention. Collotype will expand its capability in the future as a skill that reflect producer's thoughts faithfully, as a skill that express continuous tone on hand-woven Japanese paper, and as a skill that retain the warmth and human touch of a characteristic analog style by a process with many people engaged in.
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Hiroyuki Hagura
2004 Volume 67 Issue Suppliment2 Pages
28-31
Published: November 16, 2004
Released on J-STAGE: August 11, 2011
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There have been various kinds of 3D display technologies commercialized. We cannot predict the number of only patents and ideas about 3D imaging technologies which were not commercialized. In addition to 3D on TV, PC, Network, there are wide range of diversification of 3D contents technologies such as 3DCG, VR (MR or AR), SVFX. Most of 3D technologies used today are still basically the same as well-known 3D technologies. These technologies have been improved. Recently glassless autostereograph is getting popular and the contents for the displaies (LCD, PDP and cellular phone) are developed. And the image transforming technology from 2D to 3D is also developed to utilizing the existing 2D images. Besides, the technology assisting eye functions is recently studies. In the future displayless 3D images will be come true!
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[in Japanese]
2004 Volume 67 Issue Suppliment2 Pages
32-34
Published: November 16, 2004
Released on J-STAGE: August 11, 2011
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[in Japanese]
2004 Volume 67 Issue Suppliment2 Pages
35-36
Published: November 16, 2004
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KAZUO UNNO
2004 Volume 67 Issue Suppliment2 Pages
38-39
Published: November 16, 2004
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Lecturer wants digital cameras to be used more on the school education.
Most of the compact digital cameras have the short focal length of a lens, compared with the cameras using 35mm film. It means the compact digital cameras have much more depth of the field than the cameras using 35mm film. This is very useful for the close-up photography. With the camera using 35mm film, . And Schoolchildren interest close-up photography very much.
The lecturer has some experience of the education using digital cameras on the schools. For example, The Lecturer gave lessons on the four elementary schools on the Author visit program by Asahi Shinbun-sha. The lecturer lend out compact digital cameras to all the members' of the classes before the lecture. It had classes based on the photographs which were taken by the schoolchildren. I wish to speak about some of my experience on this lecture.
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Masanori Tagami
2004 Volume 67 Issue Suppliment2 Pages
40-41
Published: November 16, 2004
Released on J-STAGE: August 11, 2011
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At the schools of the school to which computer introduction goes, the digital camera is used especially as information machines and equipment. The research activities which the writer performed are introduced about the use situation and use promotion in the school spot, and the future direction of this laboratory is also described.
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[in Japanese], [in Japanese]
2004 Volume 67 Issue Suppliment2 Pages
42-43
Published: November 16, 2004
Released on J-STAGE: August 11, 2011
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Since 1995, we have been taking part in “Yume Kagaku-21” sponsored by the Chemical Society of Japan, the Japan Chemical Industry Association and so on.
This event is aimed at pupils so as to arouse their interest in ‘Chemistry’, and it takes place during their summer vacation. The events include a lot of chemical experiment show closely planned by ten or more chemical companies. We have demonstrated several experiments related to the chemistry of silver halide photography and they had a good reputation. Especially, the experiment of ‘Color Development’ used a photographic material having ultra low sensitivity in which an exposure and a development can achieve without the use of a dark room has been very popular among pupils. We will continue such activities in order to make silver halide photography more familiar and prevalent.
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Atsushi Yamaguchi, Noritsugu Kometani, Yoshiro Yonezawa, Okitsugu Kaji ...
2004 Volume 67 Issue Suppliment2 Pages
46-47
Published: November 16, 2004
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Delocalization and energy transfer of the molecular exciton of the J-aggregate of oxacyanine dye, N, N'-dioctadecyl-oxacyanine perchlorate (S9) in LB films have been examined. Fluorescence lifetime of the S9 J-aggregate (S9 (J)) appears to be ca. 1 / 20 of the isolated S9 molecules (S9 (M)), which suggests that the coherent size of the J-aggregate, N
cohe, is about 22 at room temperature. Quenching of resonance fluorescence of S9 (J) by thiacyanine dye, N, N'-dioctadecyl-thiacyanine perchlorate (S11) obeys the Stern-Volmer relation with a Stern-Volmer constant of 1.2×10
3nm
2 molecules
-1 at room temperature, which is responsible to the incoherent size N
inco of about 2000. The rate constant of energy transfer kET amounts to 1.5×10
13nm
2 molecules
-1s
-1.
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Atsushi Yamaguchi, Akihito Yoshida, Noritsugu Kometani, Yoshiro Yoneza ...
2004 Volume 67 Issue Suppliment2 Pages
48-49
Published: November 16, 2004
Released on J-STAGE: August 11, 2011
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Langmuir-Blodgett (LB) films incorporating unsymmetrical merocyanine dyes; MC (X), (X=0, S, Se), have been fabricated. The J-aggregates of MC (S) and MC (Se) are characterized by a sharp J-band and resonance fluorescence. MC (0) forms a non-fluorescent aggregate having a broad absorption band. We have examined the formation of mixed J-aggregates in the MC (X)/MC (Y) assemblies (X, Y=O, S, Se). It has been found that a homogeneous aggregate of amalgamation type (HA-aggregate) is formed in the MC (S)/MC (Se) assembly. The mixed J-aggregate in the MC (0)/ MC (S) and the MC (0)/ MC (Se) assemblies are classified into a mosaic (M-) or a separate (S-) aggregate. Despite of similar molecular structure of MC (O) with both MC (S) and MC (Se), the growth of the MC (0) aggregate with a help of the MC (S) or the MC (Se) J-aggregate as a template may hinder the homogeneous mixing of dye molecules.
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Tooru Toda, Tomoo Takeuchi, Jyunichi Hanna, Tadaaki Tani
2004 Volume 67 Issue Suppliment2 Pages
50-51
Published: November 16, 2004
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The measurement of the current voltage characteristics of a liquid crystal
2-(4'-Octyphenyl)-6-dodecyloxynaphthalene (8-PNP-012) with several electrodes with variation of work function revealed the Schottky type injection of positive holes to 8-PNP-012 from the electrodes with large work function. It was also indicated that electric double layers, which should retard the positive hole injection, were formed at the interface between 8-PNP-O12 and the electrodes.
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Toshiaki Ochiai, Shingo Kaneta, Toshifumi Mimura, Hiroyuki Saito, Taka ...
2004 Volume 67 Issue Suppliment2 Pages
52-53
Published: November 16, 2004
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We demonstrate comparative characteristic of flexible transparent organic light emitting devices (FTOLEDs) by using two kinds of a typical hole injection layers V
2O
5. PEDOT-PSS. The FTOLEDs were grown on a ITO-coated plastic substrate with a transparent top electrode composed of IZO film. Hole injection characteristics of FTOLEDs improved by insertion of hole injection layer.
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K. Saito, F. Shiba, Y. Okawa, T. Ohno
2004 Volume 67 Issue Suppliment2 Pages
54-55
Published: November 16, 2004
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It is known that the addition of an anionic surfactant sodium dodecylsulphate (SDS) drastically increases of an aqueous gelatin. The increase can be caused by both electrostatic and hydrophobic interactions. In the present study, we focused the electrostatic one: the effect of both anionic and cationic surfactants to gelatin were investigated by viscosity measurement and HPLC (GPC). The addition of SDS increases the viscosity of gelatin solution and the GPC pattern obtained with an SDS-containing eluent shifted toward lager molecular weight, suggesting the formation of a large aggregate composed of gelatin and SDS. pH-Dependence of the viscosity suggest that the electrostatic interaction is dominant. On the contrary, the viscosity increase by addition of a cationic surfactant dodecyltrimethylammonium bromide (DTMAB) was much smaller. To comparison between the surfactant types will be discussed
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Kimiyasu Morimura, Hirotomo Sasaki, Tetsuro Kojima, Mikio Ihama, Seiji ...
2004 Volume 67 Issue Suppliment2 Pages
56-57
Published: November 16, 2004
Released on J-STAGE: August 11, 2011
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We studied the reactions of sulfur, selenium and tellurium sensitizers to form sensitization centers, and their effects on reciprocity-law behavior of AgBr emulsion grains in the light of measured values of electron trap depth and electron lifetime. The obtained results were understood on the basis of our proposed model that a sensitization center is a dimmer of substitutional chalcogenide ions on the surface of AgBr grains.
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Spectrally Sensitized Emulsions
Mikio Ihama
2004 Volume 67 Issue Suppliment2 Pages
58-59
Published: November 16, 2004
Released on J-STAGE: August 11, 2011
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Natural background radiation and X-ray radiation for the baggage check in an airport affect the photographic properties of silver halide imaging materials. The new mechanism of latent image formation by these ionizing radiations was proposed in the previous report on the basis of the experimental results by using
60Co-γ-ray and 80kVp-X-ray irradiation in octahedral AgBr emulsions. The Experiments were extended to spectrally sensitized emulsions to clarify the scope and limitation of the proposed mechanism. It was found that the sensitivities of spectrally sensitized emulsions for these ionizing radiations could be also predicted quantitatively from the characteristic curve for visible-light radiation except the emulsions with extremely low quantum sensitivity.
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Tadaaki Tani, Kenichi Kuwabara, Shingo Nishiyama
2004 Volume 67 Issue Suppliment2 Pages
60-61
Published: November 16, 2004
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A new nuclear emulsion was developed for the detection of neutrinos. The reset of the emulsion was achieved by treating the films of the emulsion containing methyl-benzotriazole (MBT) under highly humid condition for several days. It was thought that the wet gelatin phase in the emulsion preferentially oxidizes large silver clusters constituting the noises caused by cosmic rays incident to the films during storage, and converts them into small ones without deteriorating sulfur-plus-gold sensitization centers. While MBT has little influence on processes other than development, it depresses the development slowly initiated by the above-stated small clusters without depressing the development quickly initiated by large silver clusters formed after the reset treatment.
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Mitsuo Kawasaki, Mitsuhiro Hori
2004 Volume 67 Issue Suppliment2 Pages
62-63
Published: November 16, 2004
Released on J-STAGE: August 11, 2011
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Thin Pt nano-island films sputter-deposited on optically flat substrates are characterized by fine nanoparticles less than-10 nm in diameter, so closely packed together with considerable interparticle overlaps to assume a pseudo-continuous metal film. These films had nearly constant optical absorption and reflection in the near-ultraviolet and the whole visible regions. By single, nanosecond, pulse laser irradiation with a selected laser energy, the nano-island film immediately underwent a large reconstruction in morphology (aggregative granulation), turning to an optically transparent state in the whole visible region. This laser-induced conversion enabled a high-density optical recording with a resolution at least 2000 lines/mm, which we confirmed by recording a variety of fine interference patterns.
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Fumiyuki SHIBA, Yousei MITA, Tomohiro YAMAKAWA, Yusuke OKAWA, Takashi ...
2004 Volume 67 Issue Suppliment2 Pages
64-65
Published: November 16, 2004
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Preparation of monodisperse tungsten oxide particles was investigated. In this study a NaWO
4 solution was aged at 40°C for 3 days under a low pH condition with HClO
4. The solution generated white gel-like precipitates, which changed their color to yellow with aging. The precipitates, probably WO
3·H
2O, were uniform cubic-like particles, of which the mean edge length and its variation coefficient are 420nm and 15%, respectively.
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Tomoaki NAKAO, Kenichi KUGE, Tomoko SAKAI, Akira HASEGAWA
2004 Volume 67 Issue Suppliment2 Pages
66-67
Published: November 16, 2004
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We have been improving upon the method of preparing gold particles in gelatin layer using photographic materials. By recording an interference fringes, we obtained a hologram consisting of gold particles by this method. After baking the gratings at 460°C the gelatin layer was burned out, and the gold particles were fused and formed a gold layer. Then, we obtained the gratings made of striped gold metal layers stuck on the glass plate. Gratings of 250 n-1μm pitch were observed with AFM. The maximum diffraction efficiencies were about 9% at transmitted light for the grating without baking and 1.6% at reflected light for the baked one. It would be possible to prepare hologram images stable even in severe environments with this method.
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
2004 Volume 67 Issue Suppliment2 Pages
70-71
Published: November 16, 2004
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IEC 62220-1 has therefore been developed in order to specify the measurement procedure together with the format of the conformance statement for the detective quantum efficiency (DQE) of digital x-ray imaging devices. In the DQEcalculations proposed in this standard it is assumed that system response is measured for objects that attenuate all energies equally (task independent). The standard can be seen as the first one in a series describing all relevant parameters of digital x-ray imaging devices. We introduced the determination of DQE of flat paneldetector (FPD) systems by this standard.
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
2004 Volume 67 Issue Suppliment2 Pages
72-73
Published: November 16, 2004
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We presented the comparison of our measured imaging properties (MTF, DQE) of flat-panel detector (FPD) systems and them of digital x-ray imaging devices reported in RSNA'2003 measured by IEC 62220-1.
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Yoshiyuki ASAI, Yuko Shintani, Hideaki KUBOTA, Yoshiaki OZAKI, Masao M ...
2004 Volume 67 Issue Suppliment2 Pages
74-75
Published: November 16, 2004
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In 1990's, Digital Imaging and Communication in Medicine (DICOM) standard proposed the Gray-scale Standard Display Function (GSDF) as a calibration tool for consisting the output gradation characteristics for medical images. However, in the previous paper, we showed that the GSDF could not satisfy the perceptual linearization in encountered during a clinical diagnosis in a hospital due to the eye response model by Barten. In this study, we propose a new method for obtaining an ideal shape of the calibration curve corresponding to the various observation environments, using the minimum perceptible luminance difference.
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
2004 Volume 67 Issue Suppliment2 Pages
76-77
Published: November 16, 2004
Released on J-STAGE: August 11, 2011
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We evaluated the imaging properties (digital characteristic curve, standard deviation, Wiener spectrum, MTF) of high-speed 2-dimensional detector for 4D-CT by using the evaluation method for the flat-panel detector.
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Nozomu Funyu, Makoto Ogawa, Akira Naito, Masuo Tanaka, Shin Ohno
2004 Volume 67 Issue Suppliment2 Pages
78-79
Published: November 16, 2004
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In the digital photography system, the tonal characteristics of the system is evaluated by Camera-through Sensitometry: CTS as the traditional photography. The tonal characteristics of reproduction image on the CRT monitor shot by digital steel camera. DSC was directly measured by colorimetric analysis. The lightness data on the displayed softcopy image of lightness linear single color step charts showed linear relation with the input data level. The slope of those characteristics indicated the qualitative tone characteristics of DSC. The authors also newly propose the introduction of sectional classified tonal charts for the shadow, mid-range and highlight tonal regions.
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Yasuhiro AWATSUJI, Atsushi FUJII, Masaki SASADA, Toshihiro KUBOTA
2004 Volume 67 Issue Suppliment2 Pages
80-81
Published: November 16, 2004
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The authors present a parallel phase-shifting digital holography as a digital imaging technique for recording and reconstruction of three-dimensional object. The technique is implemented by inserting a phase-shifting array device consisting of array of 2×2 phase-retarder array into the conventional optical system for digital holography using Fresnel transform alone. Both the computer simulation and the preliminary experiment have been conducted, so that the validity of the proposed technique has been verified. The technique is capable of noiseless instantaneous measurement of three-dimensional objects.
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Sharon Gershoni, Hiroyuki Kobayashi
2004 Volume 67 Issue Suppliment2 Pages
82-83
Published: November 16, 2004
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The presented research used photography as a case of art, to define the relationship between the aesthetic experience, manifested in the building blocks of the poetic language of photography- luminance contrast values, and the viewer's sensitivity as indicated by the ability to detect-read this language. Contrast sensitivity was measured for trained and novice participants, who performed sorting and order ranking tasks. Samples used were Ansel Adams photographs and grey-scales, in sets of controlled contrast increments. The results show a difference in contrast sensitivity between grey-scales and photographs, especially in regard to contrast changes applied to shadow values. On the other hand, it was shown that spatial configuration determines contrast sensitivity, with no influence by thematic context. These findings support the anchoring theory of lightness perceptionl2, and draw a connection between the theory and photography.
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Yoshio SEOKA
2004 Volume 67 Issue Suppliment2 Pages
84-85
Published: November 16, 2004
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We have researched the comparison of image stability at long term dark condition between stability by accelerated test. Conclusionally, we recommend 70%RH for high humidity condition in Japan and 40%RH for stable storage condition.
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Kentaro Hayashi, Kenichi KUGE, Hroshi SHIBUYA, Nakahiro YASUDA, Hirosh ...
2004 Volume 67 Issue Suppliment2 Pages
88-89
Published: November 16, 2004
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High energy heavy ions used for cancer medical treatment etc. cause nuclear crush reactions with a certain probability. It is necessary to detect what and how many reactions take place in order to estimate dose in the treatment accurately. Although CR-39 which is a plastic track detector is used to detect heavy ions with high energy, it cannot detect ions lighter than Li. The silver halide photograph emulsion which could record all charged particles was used in order to detect and analyze the heavy ions lighter than Li. We used the developer whose developing power was altered and the tracks of light ions disappear with weaker developer. This suggested the possibility to detect the light ions individually.
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Kenichiro ISHII, Akira HASEGAWA, Kenichi KUGE
2004 Volume 67 Issue Suppliment2 Pages
90-91
Published: November 16, 2004
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The conductivity of silver bromide emulsion microcrystal was measured using microwave technique. The dielectric loss method has been conventionally used for the measurement of electric conductivity of the interstitial silver ion. However, it is necessary to take the influence by crystal form into consideration by this method. By using microwave technique, it is thought that it is not influenced by crystal form. In this research, it measured by changing particle size and temperature to the pure cubic and octahedral AgBr microcrystals. And from this result, we got the activation energy, E=0.32eV
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Sharon Gershoni
2004 Volume 67 Issue Suppliment2 Pages
92-93
Published: November 16, 2004
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Gestalt school of psychology produced important conclusions about how features of an observed subject, are perceptually organized into a meaningful figure- the four gestalt. These principles match the physiology of the visual system, and influenced theories in vision science and psychology on form perception, such as: pattern recognition, artificial intelligence and computer vision development, etc. Gestalt theory also inspired many artists, designers and photographers throughout the 20th century. Following this tradition, I have studied Gestalt and through practice, I created a type of photographic images, which demonstrate Gestalt compositions and principles through an aesthetic experience.
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Comparison with Color Films
Naokazu Aoki, Kenichiro Nakajima, Yasuhiko Shiokawa, Hiroyuki Kobayash ...
2004 Volume 67 Issue Suppliment2 Pages
94-95
Published: November 16, 2004
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Often noise of digital cameras is evaluated by measuring rms of digital values of CCD. In this case our vision properties are not taken into consideration. In the present paper, a method is proposed where the measured rms granurality is corrected using working curves obtained from the rms granurality/ substantial evaluation score relationship of prints from silver halide films.
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Application of Goniospectrophotometric Color Measurement System
Noriyuki KAWAI, Yukio TOKUNAGA, Tetsuya ASHIDA
2004 Volume 67 Issue Suppliment2 Pages
96-97
Published: November 16, 2004
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It is important to investigate the factors that affect to the photo-image quality of hardcopy. Using several hardcopy systems, the correlation of subjective evaluation on a feeling of photo-image quality with the optical phenomena (e.g. glossiness) measured by the goniospectrophotometric color measurement system (GCMS) was discussed.
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Yuki Harada, Kazuto Tokumitsu, Hiroshi Saijo
2004 Volume 67 Issue Suppliment2 Pages
98-99
Published: November 16, 2004
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With expecting the optical quantum-dot fabrication of organic dyes and pigments, we tried the refinement of Cu-Phthalocyanine particles by nozzle-jet water cavitation method. Commercially available Phthalocyanine powders are known with deep blue to green colors. However, the color is known to be bright if the pigment size becomes small and mono-disperse.
The nozzle-jet water cavitation method for the refinement is to break the aggregated particles on the points where they adhere by the shock wave that is generated by the collapse of non-equilibrium cavities created in a fluid. The heat that is created at the collapse of cavities may reach several thousands degree, for several micro- or pico seconds, but the energy is small and not effective for the refinement. The Phthalocyanine powder was injected with water and surfactant to prevent the re-coagulation. The single open orifice (0.12mmφ) was used and the injection pressure was up to 1500kgf/cm
2. The mean particle size after cavitation was 35 nm and the minimum, 20nm.
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H. Uenishi, M. Hosaka, M. Iwasaki
2004 Volume 67 Issue Suppliment2 Pages
100-101
Published: November 16, 2004
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Quinacridone is widely used for paint, ink, resin, and fiber as a red pigment. And its color is able to being changed by introducing the methyl- or chloro-substituents. In the industrial process, it is known that the color of the reacting solution changes to blue on adding base, though the depositing pigment is red. In this study, various solutions of sulfo-substituted quinacridone were examined to study the metachromasis of quinacridone, and the mechanism of the metachromasis was discussed.
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T. Kitazono, K. Hiraoka, Y. Ito, M. Iwasaki
2004 Volume 67 Issue Suppliment2 Pages
102-103
Published: November 16, 2004
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Titanium dioxide is known as photocatalytic material. The industrial process to manufacture titanium dioxide uses hazardous materials, such as chlorine or sulfuric acid, and requires large plants. In this study, photocatalytic titanium dioxide is manufactured by direct chemical-oxidation process, which is much convenient and simple in comparison with conventional way. The powder and thin-layer type photocatalytic materials made by direct chemical-oxidation process are evaluated.
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