Abstract:
Imagewise light exposure of a layer of a composition comprising a uranyl compound and an hydroxyl-containing compound results in photolytic reduction of uranyl ions which, upon subsequent contact with a developer fluid containing ferricyanide ions, form an imagewise deposition of a distinct uranyl ferrocyanide color body. Application of a toning fluid containing ferric ions may subsequently be employed to achieve neutral image tones.
Abstract:
THIS APPLICATION DESCRIBES A PROCESS FOR RECORDING AN IMAGE WHICH COMPRISES SUBJECTING TO IMAGE-WISE LIGHT EXPOSURE A LAYER COMPRISING A PHOTO-LABILE ORGANO METALLIC COMPOUND SO AS TO PRODUCE AN IMAGE-WISE DISTRIBUTION OF ONE OR MORE ACTIVE SPECIES IN SAID LAYER, THE SAID PHOTOLABILE ORGANO METALLIC COMPOUND BEING A PHOTO-LABILE COBALT OR IRON COMPLEX OF A SPECIFIED FORMULA.
Abstract:
An electron and/or photon sensitive soluble copper salt in solution is coated upon a substrate, with subsequent evaporation of its solvent. For substrates which resist wetting by the copper salt solution, a wetting agent or film former is employed to obtain an even copper salt coating. For cases where the medium is to be electron exposed, resistivity of the medium is maintained at a sufficiently low level by an additional coating of adequately low resistivity applied beneath the cooper salt layer. After electron or photon exposure, the latent image is developed by exposing the latent image to metal vapor. Thereupon a stable and visible image is formed. The optical density of the image is proportional to the exposure. When the substrate is transparent, this image can be employed in projection.
Abstract:
A lead iodide photographic film having photosensitivity which is low at room temperature but which can be portionally increased. Precursors of the lead iodide can be coated in separate layers on a film support. A dry developing agent, such as ascorbic acid, and a heat trigger, such as acetamide, can be incorporated to enhance the temperature sensitive photoresponse of the film. The image can be fixed with an alkaline solvent or by plating a more noble metal on the lead, such as copper. A method and mechanism are disclosed for add-an-image exposure and processing.
Abstract:
There is described photosensitive elements which employ as the photosensitive component organic amine metavanadates and processes of producing photographic images and reliefs with these photosensitive elements.
Abstract:
A process for selectively depositing nickel by irradiating selected portions of a substrate coated with an irradiation sensitive compound. Immersing the irradiated substrate in a developer deposits controlled amounts of nickel in the selected portions.
Abstract:
A PROCESS FOR PREPARING A LIGHT-SENSITIVE ELEMENT BY PRECIPITATING MERCUROUS IODIDE SUBSTANTIALLY FREE OF MERCURIC IONS FROM STOICHIOMETRIC AMOUNTS OF MERCUROUS NITRATE IN A NITRIC ACID SOLUTION AND POTASSIUM IODIDE, CONDITIONING THE RESULTING MERCUROUS IODIDE AND COATING IT ON A SUPPORT. THE PRECIPITATION OCCURS IN THE PRESENCE OF AQUEOUS POLYVINYL ALCOHOL OR INERT GELATIN.
Abstract:
A photochromic information display and storage device comprises a photochromic target having two absorption states, one of which includes a nondestructive readout band. The target comprises, for example, cerium or lanthanum-doped calcium fluoride crystals. The device also includes means for switching the target from one absorption state to the other and means for directing light in the nondestructive readout band onto the target for the purpose of reading the information stored thereon. The device may also include means for detecting that portion of the light in the nondestructive readout band which is not absorbed by the target and/or means for switching the absorption state of the target back to its original state.