摘要:
NOVEL PHOTOGRAPHIC MATERIALS COMPRISING A LIGHT-SENSITIVE LAYER AND A LIGHT-ABSORBING MATERIAL ARE DESCRIBED. THE LIGHT-ABSORBING MATERIALS COMPRISE COLORED COMPONENTS WHICH ARE DECOLORIZED BY VARIOUS FORMS OF ENERGY, SUCH AS, FOR EXAMPLE HEAT. THE NOVEL LIGHT-ABSORBING MATERIALS ARE USEFUL IN ANTIHALATION LAYERS PARTICULARLY ADAPTED FOR PHOTOTOGRAPHIC ELEMENTS DESIGNED FOR DEVELOPMENT WITH HEAT.
摘要:
Y WHEREIN R4 IS SELECTED FROM THE GROUP CONSISTING OF A HYDROGEN ATOM, AN ALKYL RADICAL OR AN ARYL RADICAL AND Y IS SELECTED FROM THE GROUP CONSISTING OF AN OXYGEN ATOM, A SULFUR ATOM OR A SELENIUM ATOM AND R5 IS SELECTED FROM THE GROUP CONSISTING OF A HYDROGEN ATOM, AN ALKYL ATOM OR AN ARYL ATOM; OR
A NOVEL CLASS OF DYES ESPECIALLY USEFUL AS SENSITIZERS FOR PHOTOGRAPHIC SILVER HALIDE EMULSIONS AND ELECTROGRAPHIC COATINGS OF ZINC OXIDE HAVING THE FOLLOWING STRUCTURE: WHEREIN R6 HAS THE SAME DESIGNATED VALUE AS R5.
R6-NH-C(=S)-NH-N WHEREIN Z REPRESENTS THE ATOMS REQUIRED TO FORM A BASIC HETEROCYCLIC NUCLEUS; R1 IS AN ALKYL OR ARYL RADICAL; R2 AND R3 ARE SELECTED FROM THE GROUP CONSISTING OF A HYDROGEN ATOM, LOWER ALKYL RADICAL OR ARYL RADICAL AND Q IS A RADICAL SELECTED FROM:
摘要:
Exposure of the conventional dye sensitized zinc oxide resin binder copy material is accomplished with a radiation source that emits a high level of energy at 535 nanometers. The photoelectrostatic copying method involves illuminating the original to be reproduced with a mercury-vapor type lamp which has been modified to include thallium vapors through the introduction of thallium halide into the lamp envelope. A high intensity green light is emitted which performs as a monochromatic energy source and finds particular application when reproducing originals having more than one color indicia thereon so that all colors are reproduced in accordance with their relative brightness on the original.
摘要:
An electrophotographic layer composed of a zinc oxide photoconductor, a resinous binder and at least one compound selected from hematein and hematoxylin.
摘要:
A PHOTOCONDUCTIVE FIBER SHEET IS PRODUCED BY DYEING WITH A SENSITIZING SOLORING MATTER A FIBER SHEET MADE OF ORGANIC HIGH POLYMER FIBERS CAPABLE OF ACTING AS A LEWIS BASE AGAINST A LEWIS ACID AND FORMING A CHANGE TRANSFER COMPLEX WITH THE LEWIS ACID AND THEN TREATING THE FIBER SHEET WITH THE LEWIS ACID.
摘要:
ELECTROPHOTOGRAPHIC RECORDING MATERIAL CONTAINING PHOTOCONDUCTIVE ZINC OXIDE TREATED WITH GUANAZOLE AND PROCESSES OF ELECTROPHOTOGRAPHIC RECORDING USING SUCH MATERIALS. THESE MATERIALS ARE CHARACTERIZED BY LOW MEMORY EFFECT, IMPROVED CHARGING CHARACTERISTICS AND ARE CAPABLE OF ACCEPTING EITHER POSITIVE OR NEGATIVE CHARGES TO OBTAIN EITHER POSITIVE OR NEGATIVE COPIES.
摘要:
ELECTROPHOTOGRAPHIC ELEMENTS CONTAINING ALKALI-RELEASE MATERIALS ADMIXED WITH PHOTOCONDUCTIVE COMPOSITIONS ARE DESCRIBED. WHEN THESE ELEMENTS ARE DEVELOPED AND HEATED, THE ALKALI-RELEASE MATERIALS GENERATE ALKALINE PRODUCTS WHICH CAUSE A SHIFT IN THE ABSORPTION OF THE SENSITIZERS CONTAINED IN THE PHOTOCONDUCTIVE COMPOSITIONS. SUCH A SHIFT GENERALLY REDUCES THE OPTICAL OPACITY OF THE ELEMENTS, THUS PERMITTING THE ELEMENTS O BE USED AS MASTERS FROM WHICH FURTHER REPRINTS CAN BE MADE.
摘要:
As a spectral sensitizer for photosensitive compositions containing a photolyzable organic halogen compound, at least one aromatic polycyclic compound having an ionization potential below about 7.4 is used. Preferred are colored, linear fused-ring polynuclear carbocyclic compounds (acenes) which are essentially unreactive with the organic halogen in the dark under room conditions.
摘要:
AN ELECTROPHOTOGRAPHIC RECORDING ELEMENT HAS A PHOTOCONDUCTIVE LAYER THAT COMPRISES A NOVEL PHOTOCONDUCTOR WITH QUENCHED LUMINESCENCE DURING THE ELECTROSTATIC CHARGING THEREOF. THE PHOTOCONDUCTIVE LAYER MAY ALSO COMPRISE A LIGHT-SENSITIZING DYE THAT HAS A LIGHT-ABSORPTION BAND WITHIN THE RANGE OF THE LUMINESCENCE EMISSION OF THE PHOTOCONDUCTOR. A NOVEL METHOD OF MAKING THE PHOTOCONDUCTOR COMPRISES DOPING SUBSTANTIALLY PURE ZINC OXIDE WITH A FLUORIDE.
摘要:
An electrophotographic copying material, comprising a support sheet having a front and a reverse side, said reverse side having been given an electroconducting treatment and said front side being impregnated with or directly coated with as assistant sensitizer, said front side further having, on the face of the assistant sensitizer applied on said side, a light-sensitive layer (photoconductive layer) containing an organic photoconductive substance. A method for manufacturing the aforesaid copying material, comprising first applying a solution of an assistant sensitizer onto the front side of a support sheet with its reverse side already having been given an electroconducting treatment, drying the applied assistant sensitizer at a temperature ranging from 60* C. to 100* C, and then forming a light-sensitive layer on the face of the applied assistant sensitizer.