摘要:
The invention concerns a method and a device for extracting the halide ions from fixing or bleaching/fixing photographic solutions containing mainly thiosulphate as the fixing agent, bringing the solutions into contact with a nanofiltration module including at least two membranes of different types. The method enables the activity of the fixing or bleaching/fixing baths to be extended during the processing of photographic products.
摘要:
The invention concerns a cassette for a photosensitive product. The cassette comprises: a) a light-tight case; b) at least one roll of the photosensitive product wound on a core, the core being rotatably mounted inside the case; and c) means for indicating the quantity of photosensitive product remaining in the case; the indication means including means for determining the angle of rotation of the core in response to the unwinding of a given length of the photosensitive product, the angle being representative of the quantity of product remaining on the core.
摘要:
The invention relates to a method for preparing particles of metal oxide, as well as particles obtained by such method. The method consists in: precipitating a hydroxide, adding an inorganic compound such as a salt having a melting point lower than the oxide crystallization temperature, and heating the hydroxide and the salt at a high temperature. An oxide in the form of a fine powder is obtained, thus particularly allowing to perform thin conductive layers.
摘要:
L'invention concerne un dispositif de couplage à vitesse angulaire variable. Le dispositif selon l'invention permet un couplage de vitesse angulaire entre un bras d'entrée (41) et un bras de sortie (47) commandant un organe (2, 3, 4, 5) destiné à être mis en engagement avec un support mobile entraîné à vitesse sensiblement constante, ledit dispositif comprenant une paire de cames conjuguées dont les profils respectifs permettent un déplacement angulaire relatif entre le bras d'entrée (41) et le bras de sortie (47), de manière à conférer audit organe une vitesse linéaire sensiblement identique à la vitesse du support mobile, lorsque ledit organe est en engagement avec ledit support mobile.: Application aux dispositifs de découpe des films radiographiques.
摘要:
The invention concerns a method for the treatment by electrolysis of used photographic solutions, in particular those containing developers for X-ray films, in an electrolysis cell comprising at least one platinum anode and at least one cathode. According to the invention, a current density profile is used, and the current density at the start of electrolysis does not exceed 50% of the maximum density of the electrolysis current. The invention enables the quantity of foam formed during electrolysis to be reduced.
摘要:
The invention concerns a composite gel comprising an inorganic matrix containing a fibrous inorganic polymer in which an active organic compound is dispersed. The invention also concerns a device comprising the gel and a process for delivering a controlled quantity of active organic compound in an aqueous solution. The invention applies to the prevention of biological growth in aqueous solutions used domestically, agriculturally or industrially, in particular in the solutions used in photographic processing.
摘要:
The invention relates to a device for coating a moving support by means of a curtain. According to the present invention, the lip of the coating device has a front surface (10) which is substantially vertical or positive, a positive rear surface (11) defining, with respect to the front surface (10), an angle of less than 90° and a chamfer (12) between the lower ends of the said front and rear surfaces, the said device being characterised in that the ratio between the thickness of the coating composition at the level of the front surface (10) of the lip and the width of the chamfer (12) is at least one. Application to photographic coating.
摘要:
The invention concerns a device for distributing liquid by gravity. The device (20) comprises: a) a rigid cylindrical outer pipe (1); b) an inner casing (2) produced from a flexible material and the external diameter of which is less than or equal to the internal diameter of the pipe, the said casing (2) being arranged so as to define, with the pipe (1), substantially concentric first and second zones (3,4) isolated from each other, the second zone (4) being connected to a source of fluid (5,10,11) so as to be able, under the effect of the pressure of the fluid, to cause the relative volumes of the said first and second zones (3,4) to vary in order to control the flow of liquid in the first zone (3); and c) a source of pressurised fluid (5,10,11) connected to the said second zone (4). Application to the feeding of photographic coating devices.
摘要:
The invention concerns a monodisperse emulsion with improved sensitivity. The emulsion of the invention is sensitized with sulphur and gold, and a quantity of thiocyanate of between 0.1 and 1.0 mole per mole of silver is added thereto. A sensitisation level equivalent to that of a corresponding polydisperse emulsion can be obtained.