摘要:
The invention concerns a method and a device for the selective extraction of the halide ions from photographic baths. According to the invention, the solutions to be treated are subjected to a first nanofiltration step 2 in diafiltration mode, then to a second nanofiltration step 3 in concentration mode. The method makes it possible to prolong the activity of the fixing or bleaching/fixing baths during the processing of photographic products.
摘要:
A method for selectively extracted species from an aqueous solution which comprises contacting the aqueous solution with a membrane capable of selectively transporting species from a liquid to another, the membrane comprising a porous polymer support having an average surface pore size less than 100 nm, coated with a continuous layer of a fluorinated polymer obtained by plasma energized chemical vapor deposition (PECVD) using a plasma containing at least one fluorinated compound.
摘要:
The invention relates to a method and device for processing an exposed color reversal photographic film. This method enables the water consumption of the washing baths to be limited, the water levels being maintained by a counter-current coming from the bath placed downstream, an equivalent volume of water being discharged through an overflow. The wash waters are recovered and treated by a nanofiltration unit capable of giving a permeate which can be recycled to the washing baths. This method makes it possible to overcome the problem of the presence of tin (II) in the first washing bath supplied with water by a counter-current coming from the reversal bath. This process also makes it possible to overcome the problems of discharges of chemical substances to the drains while maintaining a good sensitometry of the developed films.
摘要:
The invention relates to a device for moving fluids. The invention device includes an enclosure, a solid electrolyte which can produce oxygen in the enclosure so as to distort a membrane that acts to move a fluid in an enclosure. This device is useful to produce a head for ink jet printing.
摘要:
The present invention relates to polymethine spectral sensitising dyes comprising at least one intracyclic thioether function macrocycle.These special sensitising dyes may be used in silver halide photographic products.These spectral sensitising dyes improve the sensitivity of the photographic products whilst reducing the residual dye stain.
摘要:
The present invention relates to a material intended for forming images by inkjet printing having good stability to ozone and to light as well as a uniform surface, to obtain a high-quality printed image. The material comprises a support and at least one ink-receiving layer, wherein the ink-receiving layer comprises at least one polysaccharide, such as carrageenan, and at least one hydriphillic polymer having hydroxyl groups, such as polyvinyl alcohol and guar gum, and inorganic particles having a neutral or positive surface charge.
摘要:
The invention relates to a low-water-consumption method for processing an exposed color reversal photographic film. This method comprises the circulation of this exposed film in: i) a black and white development bath, ii) a first washing bath, iii) a reversal bath comprising at least a buffer agent liable to pass through a nanofiltration membrane and, in addition, the collection of waters leaving the said reversal bath, the circulation of these waters through a nanofiltration device to produce a permeate that is recycled in the said first washing bath, a water volume at least equivalent to that supplied by the said permeate being rejected via the overflow and the said buffer agent being chosen so as to keep the pH in the first washing bath between 5 and 7.
摘要:
The invention concerns a method for treating a photographic effluent with an oxidation catalyst. This catalyst is prepared by forming in situ, in a porous membrane, a cerium derivative. In this way the thiosulfate and organics contents of photographic effluents are reduced.
摘要:
The invention relates to a method for processing an exposed color reversal photographic film. This method comprises the step of circulating the exposed film in a fixing bath, in and then a final washing zone comprises at least one washing bath. Each washing bath of this zone comprising a buffer prepared from a weak acid and its conjugated base, with a conjugated base concentration more than 1 g/l, said buffer being chosen to maintain the pH between 4.5 and 6. The method comprises then the step of collecting the contents of the washing baths of this zone and the passage of said contents through a nanofiltration device comprising a membrane, whose cut-off threshold is more than the molar mass of the weak acid and the conjugated base making up the buffer, to give a permeate that is recycled in the final washing zone.
摘要:
The invention relates to a method and device for processing an exposed color reversal photographic film. This method enables the water consumption of the washing baths to be limited, the water levels being maintained by a counter-current coming from the bath placed downstream, an equivalent volume of water being discharged through an overflow. The wash waters are recovered and treated by a nanofiltration unit capable of giving a permeate which can be recycled to the washing baths. This method makes it possible to overcome the problem of the presence of tin (II) in the first washing bath supplied with water by a counter-current coming from the reversal bath. This process also makes it possible to overcome the problems of discharges of chemical substances to the drains while maintaining a good sensitometry of the developed films.