摘要:
The present invention is a method for producing a silver halide emulsion. The precipitation of the emulsion is carried out away from the rotary agitator. The reactant solutions are introduced into the reactor very close to the tip of one or more ultrasonic horns that are placed away from the agitator. The ultrasonic horns are efficient sources for controlling micromixing, while the agitator controls the macromixing in the reactor.
摘要:
A liquefying apparatus for melting and blending solid materials includes a hopper with a coiled heating element disposed therein which supports and melts the solid materials into liquid form. The hopper is segmented into a plurality of compartments and as the solid material melts the liquid is collected in the lower portion of the hopper. The collected liquid is continuously agitated to ensure that there are no concentration pockets. The lower section is also provided with a deaeration device to prevent entrained air from entering the liquid.
摘要:
The present invention is a method for degassing an aqueous composition of chunked gelatin. Prior to melting the gelatin chunks, the gelatin is subjected to a pressure near the steam pressure corresponding to the temperature of the gelatin chunks. Application of this pressure degasses the gelatin chunks to that they can be sent directly to the melter and to the coating station.
摘要:
A method and apparatus for converting gel-like substances from a gel state to a sol state in which the melting speed can be accurately controlled over a wide range and the apparatus can be easily cleaned. A grid-type heater constructed of rotatable parallel heating pipes is disposed at the bottom of a melting tank. Rotation of the pipes which simultaneously heating them imparts flowability to a heat transfer boundary formed on the side of the gel-like substance. The melting speed is controlled by controlling the speed of rotation of the pipes.
摘要:
AN IMPROVED METHOD FOR WASHING SILVER HALIDE PRECIPITATES BY EMPLOYING ION-EXCHANGE RESINS WHICH ARE CAPABLE OF SUBSTITUTING HYDROXYL IONS AND HYDROGEN IONS FOR EXTRANEOUS SOLUBLE SALTS.
摘要:
A silver halide photographic light sensitive material comprising a support having thereon photographic component layers including a light sensitive silver halide emulsion layer and a light insensitive hydrophilic colloid layer, wherein the silver halide emulsion layer comprises a silver halide emulsion which has been subjected to desalting by ultrafiltration, at least one of the component layers containing a composite material comprising a hydrophobic polymer and inorganic particles.
摘要:
A method for making a photographic composition gel ready for use in production from a good preservative frozen state, causing no change in photographic properties, wherein a photographic composition gel is melted to a sol by placing a light shielding dielectric preservative container holding lumps of a photographic composition gel in a dielectric heating apparatus which generates high frequencies capable of penetrating to a depth corresponding to the size of the above photographic composition gel lumps, and melting the photographic composition gel to a sol by irradiating the lumps of gel with the above high frequencies from the outside of the container.
摘要:
A method and apparatus for continuously liquefying a gelled photographic material for coating on a substrate is disclosed. The material is advanced throughout the liquefaction apparatus and on to the substrate coating system as a substantially undisrupted mass. The technique is particularly useful for liquefying small amounts of material at a time, because system hold-up volume and waste is minimized.