著者
大上 進吾
出版者
社団法人 日本写真学会
雑誌
日本写真学会会誌 (ISSN:18846327)
巻号頁・発行日
vol.22, no.1, pp.38-47, 1959-03-25 (Released:2011-08-11)
参考文献数
44
著者
宮本 五郎 村山 勇 宮川 俊夫 坂部 健
出版者
社団法人 日本写真学会
雑誌
日本写真学会会誌 (ISSN:18846327)
巻号頁・発行日
vol.19, no.3, pp.124-129, 1956-11-30 (Released:2011-08-11)

Optimal amounts of phenidone and hydroquinone in D-76 type PQ developers (pH 8.7), are 0.2g and 5.0g per 1000cc each other, as shown in Fig. 1 and 2. This Formula (PQE) gives slightly more fog than D-76, but addition of 0.2g KBr or 0.01g benzotriazole retards fog (Fig. 3).Optimal pH ranges have been estimated in several kinds of developing formula (Fig. 4-13).PQ-MK (Fig. 15, 16) and PM-MK (Fig. 17, 18) developers give sensitivity about two to three times more than D-76.
著者
池田 英苗 鳥羽 光忍
出版者
社団法人 日本写真学会
雑誌
日本写真学会会誌 (ISSN:18846327)
巻号頁・発行日
vol.18, no.4, pp.110-119, 1956-03-31 (Released:2011-08-11)
参考文献数
3

For the ultraviolet absorbing filters which are abailable now-adays, such absorbent as tartrazine, ultrazine, R-acid, G-acid and aesculin are used, but they have the defects that they transmit-near ultraviolet light, absorb blue light, or are fluorescent or unstable to light.We intended to make ultraviolet absorbing filters which are colorless, non-fluoresent, clear, stable to light and sharp cut. The light transmittance of flavene, flavanone, chalcone and coumarin groups were measured at the concentration of absorbents 3g/m2 in alcohol or benzene.There are interesting relations between absorption curves and chemical constitutions.The absorption edges of flavones shift according to the number of OH and other radicals. They shift to longer wave length with the increase of OH groups and to shorter wave length with the decrease.Flavone and coumarin group have sharp absorption curves but chalcone and flavanone group have rather flat curves.Flavon group is the most excellent absorbent as the ultraviolet absorbing filters, because, besides being sharp cut of the ultraviolet light, it is non-fluorescent and light-fast. With these ultraviolet absorbing agents several kinds of filters were made.
著者
藤沢 信
出版者
THE SOCIETY OF PHOTOGRAPHY AND IMAGING OF JAPAN
雑誌
日本写真学会会誌 (ISSN:18846327)
巻号頁・発行日
vol.18, no.1, pp.1-11, 1955

1954年中に諸外国の雑誌に発表された論文や報道を種にして, 外国での写真の進歩を展望した。どんなテーマに興味があるかは各入によつてちがうだろうが, この展望では, なるべく一般的に興味のあるような題目を選んだ。