Fuji Photo Film Company, Limited

Yuko Saito

Masatoshi Nakanishi

Hiroshi Kawamoto

Hiroki Sasaki

Yoshihito Hodosawa

Nagahiko Tanaka

There is disclosed a method of preparing a photographic solid fine-grain dispersion, the method comprising the steps of: successively bringing a slurry of a water-insoluble photographically useful compound in a grinding chamber of a dispersing machine, which chamber is filled with media, allowing the compound to contact the media in the grinding chamber, to produce fine grains of the compound successively, successively separating the media from the compound by centrifugal force, and taking the compound out of the grinding chamber, using specific media with given physical properties. There is also disclosed a dispersion obtained by the method. According to the method, the photographic solid fine-grain dispersion is prepared efficiently, without coarse grains or abrasion materials resulting from media or so, and the dispersion causes no defect when coated in a form of a coating film.

Photographic solid fine-grain dispersion, method for preparing the same, and silver halide photographic light-sensitive material

Polymer having sulfonic acid group and silver halide photographic photosensitive material using the polymer

There is disclosed an emulsified dispersion, in which at least one compound of the formula (1) dissolved in an organic solvent comprising at least one high-boiling organic solvent satisfying the condition X.gtoreq.85 in formula (A) is emulsified in a water medium; with the proviso that phthalates and compounds having an epoxy group and having the viscosity less than 100 mPas are excluded from said high-boiling organic solvents: formula (1) ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, and R.sup.6, which are the same or different, each represent a hydrogen atom or a substituent, and R.sup.5 and R.sup.6 may bond together to form a 6-membered ring, formula (A)

Emulsified dispersion and silver halide color photographic

Growing community of inventors

Minami-ashigara, Japan

Yuko Saito