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    Photographic diffusion-transfer processes and elements utilizing ph-sensitive optical filter agents to prevent fogging by extraneous actinic radiation during development
    41.
    发明授权
    Photographic diffusion-transfer processes and elements utilizing ph-sensitive optical filter agents to prevent fogging by extraneous actinic radiation during development 失效
    摄影扩散转移过程和元素利用敏感光学过滤器在发展过程中通过超临界辐射防止潮气

    公开(公告)号：US3702245A

    公开(公告)日：1972-11-07

    申请号：US3702245D

    申请日：1971-01-04

    Applicant: POLAROID CORP

    Inventor： SIMON MYRON S ,  WALLER DAVID P

    IPC: C09B11/04 ,  C09B11/08 ,  C09B11/24 ,  C09B11/26 ,  G03C8/48 ,  G03C5/54 ,  G03C1/40 ,  G03C7/00

    CPC classification number: G03C8/48 ,  C09B11/04 ,  C09B11/08 ,  C09B11/245 ,  C09B11/26

    Abstract: THIS INVENTION RELATES TO PHOTOGRAPHY, AND MORE PARTICULARLY, IT RELATES TO THE USE OF CERTAIN INDICATOR DYES DERIVED FROM PHENOLS AS OPTICAL FILTER AGENTS TO PROTECT A SELECTIVELY EXPOSED PHOTOSENSITIVE MATERIAL FROM POSTEXPOSURE FOGGING IN PHOTOGRAPHIC PROCESSES WHERE DEVELOPMENT OF THE PHOTOSENSITIVE MATERIAL IS CONDUCTED IN THE PRESENCE OF EXTRANEOUS INDIDENT LIGHT. THIS CLASS OF PHENOL INDICATOR DYES CONTAIN A RING-CLOSING MOIETY BONDED TO TWO HYDROXY-SUBSTITUTED CARBOCYCLIC ARYL RADICALS SELECTED FROM TWO P-HYDROXYPHENYL RADICALS EACH POSSESSING A HYDROGEN-BONDING GROUP ADJACENT TO THE P-HYDROXY GROUP AND TWO P-PHYDROXYNAPHTHYL RADICALS AT LEAST ONE OF THE P-HYDROXYNAPHTYL RADICALS POSSESSING A HYDROGENBONDING GROUP ADJACENT TO THE P-HYDROXY GROUP. AT A FIRST PH IN ALKALINE SOLUTION THEY HAVE A HIGHLY COLORED, LIGHTABSORBING FORM CAPABLE OF ABSORBING RADIATION WITHIN A PREDETERMINED WAVELENGTH RANGE IN THE LONGER WAVELENGTH REGION OF THE VISIBLE SPECTRUM AND AT A SECOND LESS ALKALINE PH HAVE A COLORLESS FORM THAT IS SUBSTANTIALLY NON-LIGHTABSORBING IN THE VISIBLE SPECTRUM. BY SELECTING A DYE FROM THIS CLASS WHICH IS IN ITS LIGHT-ASBORBING FORM AT THE PH AT WHICH DEVELOPMENT IS PREFORMED, PROTECTION OF THE EXPOSED PHOTOSENSITIVE MATERIAL FROM RADIATION ACTINIC THERETO IS AFFORDED WITHIN THE WAVELENGTH RANGE ABSORBED BY THE DYE AND SUBSEQUENT TO AT LEAST THE INITIAL STAGES OF DEVELOPMENT, THE DYE MAY BE RENDERED SUBSTANTIALLY COLORLESS BY ADJSTING THE PH TO PERMIT VIEWING OF THE FINAL IMAGE. IN A PREFERRED EMBODIMENT, THE PHENOL DYE OR DYES ARE USED IN CONJUNCTION WITH A SECOND DYE OR DYES HAVING A PRINCIPAL ABSORPTION IN AT LEAST A PARTIALLY DIFFERENT WAVELENGTH RANGE, AND THE PHENOL DYE(S) AND SECOND DYE(S) TOGETHER AFFORD PROTECTION OVER THE WAVELENGTH RANGE OF ABOUT 400 MM. TO 700 MM.

    Dye developers which are non-reversibly spectrally shifted by alkaline hydrolysis in color diffusion transfer processes and elements
    42.
    发明授权
    Dye developers which are non-reversibly spectrally shifted by alkaline hydrolysis in color diffusion transfer processes and elements 失效
    通过碱性水解在颜色扩散转移过程和元素中不分光发射的DYE开发者

    公开(公告)号：US3579334A

    公开(公告)日：1971-05-18

    申请号：US3579334D

    申请日：1968-08-30

    Applicant: POLAROID CORP

    Inventor： CIECIUCH RONALD F W ,  SIMON MYRON S

    IPC: G03C8/18 ,  G03C5/54 ,  G03C7/00

    CPC classification number: G03C8/18 ,  Y10S430/156

    Abstract: TRANSFER IMAGES IN COLOR ARE FORMED BY EXPOSING A PHOTOSENSITIVE ELEMENT CONTAINING A SILVER HALIDE EMULSION AND A MONO OR DISAZO DYE WHICH CONTAINS NOT LESS THAN ONE OR MORE THAN TWO GROUPS SELECTED FROM THE GROUP REPRESENTED BY THE FORMULAE.

    -N=N-(CH2)2-OOC-CH2-O-R

    R-O-CH2-COO-(CH2)2-N=N-(CH2)2-OOC-CH2-O-R

    WHEREIN R IS A LOWER ALKYL GROUP, SAID DYES ALSO CONTAINING NOT LESS THAN ONE NOR MORE THAN TWO DIHYDROXYPHENYL SILVER HALIDE DEVELOPING RADICALS; PERMEATING THE PHOTOSENSITIVE ELEMENT WITH AN AQUEOUS ALKALINE PROCESSING COMPOSITION, AND DEACYLATION OF THE

    -OOC-CH2-O-R

    GROUPS BY HYDROLYSIS TO PROVIDE HYDROXYL GROUPS, THEREBY PROVIDING A NON-REVERSIBLE BATHOCHROMIC SHIFT OF THE SPECTRAL ABSORPTION CHARACTERISTICS OF DYE; IMMOBILIZING THE DYE AS A RESULT OF THE DEVELOPMENT OF THE EXPOSED AREAS OF THE EMULSION; AND TRANSFERRING, BY DIFFUSION, AT LEAST A PORTION OF THE IMAGEWISE DISTRIBUTION OF DYES TO A SUPERPOSED IMAGE RECEIVING LAYER TO PROVIDE A POSITIVE DYE IMAGE THEREIN.

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