摘要:
A method for reforming the surface of a photographic emulsion layer. In the method, the surface of the emulsion layer is dried to at least sensible dryness. Water is then deposited onto the surface of the emulsion layer. The depositing is substantially uniform and in an amount that is less than about 0.074 grams of water per square meter (0.80 grams of water per square foot) of emulsion layer.
摘要:
A vapor deposition method and apparatus that performs the method. In the method, a supply of vaporizable material is maintained, in a first zone, in thermal and phase equilibrium with a saturated vapor at a first temperature. A volume of the vapor is withdrawn to a second zone. The temperature of the volume of vapor in the second zone is adjusted to a second temperature in excess of the first temperature. The volume of vapor is delivered to a third zone. A substrate is transported through the third zone. The substrate has a third temperature below the first temperature. During the transporting, a portion of the volume of vapor is condensed onto the substrate to provide a condensate. During the condensing, the temperature of the substrate is raised to substantially the first temperarature.
摘要:
Apparatus and method for depositing water onto the surface of a substrate passed through the apparatus. The apparatus has a housing that defines an internal atmosphere confined in at least partial isolation from the ambient atmosphere. The housing has a moisture saturation portion (12), a deposition portion (36), and a passageway (16). The moisture saturation portion has a water supply (10) and a vapor reservoir. The water supply contains a quantity of water. The vapor reservoir holds a volume of the interior atmosphere in thermal and phase equilibrium with the water in the water supply. The deposition portion has a plenum wall (86) surrounding a central chamber. The plenum wall is substantially insulated from ambient temperature variations and has a pair of opposed substrate gaps (82). The gaps define a path (84) for the substrate through the chamber. The passageway (16) communicates with the vapor reservoir and the chamber. A primary heater (56) is disposed to heat the water in the water supply. A secondary heater (68) is disposed within the passageway between the vapor reservoir and the chamber. A fan (66) drives the internal atmosphere from the vapor reservoir through the passageway to the chamber. A controller (92) is operatively connected to the primary and secondary heaters. The controller senses wet and dry bulb temperatures of the internal atmosphere in the chamber. The controller actuates the primary heater at a range of wet bulb temperatures below a predetermined wet bulb limit temperature and actuates the secondary heater at a range of dry bulb temperatures below a predetermined dry bulb limit temperature. The dry bulb limit temperature is greater than the wet bulb limit temperature.