Abstract: A method for debubbling a liquid includes flowing the liquid into an inlet, applying high energy ultrasonic waves to the liquid inside the inlet, introducing the liquid into a debubbling chamber through the inlet and applying low-energy ultrasonic waves to the liquid in the debubbling chamber to obtain a debubbled liquid. An ultrasonic debubbling apparatus comprises a medium chamber containing a heat and ultrasonic wave transmitting medium, a debubbling chamber inside the medium chamber, an introducing pipe arranged to extend a predetermined length into the medium chamber so as to introduce the liquid to be debubbled into the debubbling chamber, a primary ultrasonic transducer for applying high energy ultransonic waves to the liquid in the introducing pipe and a secondary ultrasonic transducer for applying low energy ultrasonic waves to the liquid in the debubbling chamber.

Abstract: An improved method of producing a silver halide photographic material having a layer containing gelatin coated on a support is disclosed. The coated layer is dried so that its surface temperature during the falling rate drying period is more than 5.degree. C. over the melting point of the layer during drying and the jelly strength of the gelatin is at least 200 g according to the PAGI method.

Abstract: Use of the compounds represented by the general formula; ##STR1## (wherein R represents an alkyl group of 1 - 8 carbon atoms) as a permanent solvent for color coupler or ultraviolet ray absorber in color photographic materials.

Abstract: In a process for producing a silver halide emulsion through mixing a halide solution and a silver nitrate solution in the presence of a hydrophilic colloid, the improvement is disclosed wherein any part of the equipment that is employed in the process starting with the initiation of silver halide formation and ending with the coating of the emulsion on a support and with which the reaction solution will come in contact is made of a stainless steel having a molybdenum content of 2.2-5.0 wt %.