Fuji Photo Film Company, Limited

Shigenori Moriuchi

Eiichi Okutsu

Yoshio Inagaki

Kimitaka Kameoka

Yukihide Urata

Yoshiaki Suzuki

Morio Yagihara

Kazunobu Katoh

Hiroyuki Mifune

Keiichi Adachi

Masashi Ogawa

Taku Nakamura

Katsumi Hayashi

Shoji Ishiguro

Toshiro Takahashi

Senzo Sasaoka

Terumi Matsuda

Yoshitaka Akimura

Ken-ichi Kuwabara

Takeo Sakai

Yasuo Kasama

Naomi Saeki

Taiji Hashimura

A method for forming an image is disclosed which comprises providing a photosensitive material comprising at least one light-sensitive layer and having a gamma value of not less than 10 and a capability of being handled under bright light, subjecting said light-sensitive layer image-wise exposure to light having substantially exclusive of wavelengths of 370 nm or shorter through originals, for example, a line original and a halftone original arranged in a superposed condition, followed by contrast development processing, whereby excellent quality of images, for example, letter images, can be obtained.

Image forming method

An image forming process capable of providing photographic images having extremely high contrast and high resolution for use in photoengraving is disclosed, which comprises processing an image-wise exposed silver halide light-sensitive material having at least two silver halide emulsion layers on a support, one of said emulsion layers providing a contrasty gradation and the other of said emulsion layers providing a soft tone gradation, with a hydrazine contrast development system, a tetrazolium contrast development system or a lith development system, wherein the gamma (.gamma.) value of the portion having a density (D) from 0.3 to 1.5 on the characteristic curve obtained is less than 10 and the gamma (.gamma.) value of the portion having a density (D) from 1.5 to 3.0 is at least 10.

Processing a photographic material comprising an emulsion layer

A silver halide photographic light-sensitive material for plate making is disclosed. The material is comprised of a support base having thereon a sensitive silver halide emulsion layer and at least one upper insensitive layer having a melting time longer than the melting time of the sensitive silver halide emulsion layer. A method of reduction treatment for such silver halide light-sensitive material is also disclosed. The sensitive materials have excellent aptitude for reduction treatment and do not deteriorate even if the amount of silver per unit area is relatively small.

Silver halide photographic light-sensitive materials for plate making

A silver halide photographic material for a photomechanical process which has an excellent reduction processing aptitude is disclosed. The material is comprised of a support having a light-sensitive silver halide emulsion layer thereon and a light-insensitive layer disposed outside the silver halide emulsion layer. The light-insensitive layer contains a hydrophilic colloidal binder coated in such an amount per unit area as to be 1.0 or more times that of a hydrophilic colloidal binder contained in the silver halide emulsion layer.

Silver halide photographic material for photomechanical process and

A silver halide photographic light-sensitive material and a developing process used in connection with that material are disclosed. The material is comprised of a support having thereon a silver halide emulsion layer containing a silver halide emulsion in which at least 80 mole % of the whole silver halide is composed of silver chloride, the mean grain size thereof is less than 0.4 .mu.m, and which contains more than 1.times.10.sup.-6 mole of a water-soluble rhodium salt per mole of silver at an optional period before finishing the first ripening in the production step for the silver halide emulsion. The material also contains 1.times.10.sup.-5 to 1.times.10.sup.-2 mole of polyalkylene oxide having a molecular weight of at least 600 or a derivative thereof per mole of silver. The process involves imagewise exposing the material and processing it in a developer containing 0.05 to 0.5 mole/liter of a dihydroxybenzene series developing agent, 0 to 0.05 g/liter of an auxiliary developing agent, at least 0.25 mole/liter of a free sulfite ion, at least 20 mg/liter of 5- or 6-nitroindazole, and an alkali of an amount sufficient for keeping the pH of the developer higher than 10.5. The material and processing are capable of providing good letter image quality in a short developing time.

Silver halide photographic materials and process of developing them

A high contrast, chemically fogged direct positive type silver halide photosensitive material is described containing at least one ammine complex salt selected from those including cobalt, nickel, ruthenium or chromium, by which the contrast in the lower optical density region is improved while retaining superior Dmax and sensitivity.

Direct positive type silver halide photosensitive material

A continuous method for producing halftone images comprising: 1. image-wise exposing a lith-type silver halide photographic material comprising a silver halide emulsion with not less than about 85 mol% silver chloride and not more than about 8 mol% of silver iodide and containing at least one organic silver complex compound which is substantially insoluble in water in contiguous relationship with a photosensitive silver halide emulsion which contains not less than 60 mol% silver chloride and which is chemically and spectrally sensitized; and 2. developing the photographic material in a continuous fashion with a developer containing hydroquinone and a carbonyl-bisulfite adduct in the presence of a polyalkylene oxide of a molecular weight not less than 1000.

Method of forming photographic images for lithographic use

Growing community of inventors

Kanagawa, Japan

Shigenori Moriuchi