High contrast continuous tone developer containing hydroquinone, sulfite, organic azole antifogging agent and alkanolamine
Номер патента: CA1110483A
Опубликовано: 13-10-1981
Автор(ы): Joseph A. Sincius, William R. Pangratz
Принадлежит: EI Du Pont de Nemours and Co
Опубликовано: 13-10-1981
Автор(ы): Joseph A. Sincius, William R. Pangratz
Принадлежит: EI Du Pont de Nemours and Co
Реферат: ABSTRACT OF THE DISCLOSURE A photographic developer containing hydroquinone, an auxiliary developer such as phenidone, and high sulfite is formulated using an organic base such as diethanolamine. This is useful for processing litho film in rapid access machine processor to produce high contrast line and half-tone dot images from films processed therein,
Process for the formation of high contrast negative images and silver halide photographic element
Номер патента: CA1310533C. Автор: Carlo Marchesano,Jonathan Peter Kitchin. Владелец: Minnesota Mining and Manufacturing Co. Дата публикации: 1992-11-24.