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    • 58. 发明授权
    • Subbing layers for use with thermographic materials
    • 粘结层在热成像材料中的应用
    • EP0903627B1
    • 2003-12-17
    • EP98202644.5
    • 1998-08-06
    • AGFA-GEVAERT
    • Uyttendaele, CarloGeuens, IngridHoogmartens, Ivan
    • G03C1/498
    • G03C1/4989G03C1/49872G03C1/91G03C1/93
    • A substantially light-insensitive black and white thermographic material comprising a polymeric or polymer-coated support, a subbing layer on the support and on the same side of the support as the subbing layer a thermosensitive element containing a substantially light-insensitive organic silver salt, a reducing agent therefor in thermal working relationship therewith and a binder, characterized in that the subbing layer contains a binder, less than 20% by weight of silica and covalently bonded acid groups in the binder, if present, are either substantially present as free acid or substantially present as acid salts and has a leachable non-fluoro-halide ion content into water at room temperature over a period of 120 minutes of less than 0. 6mg/m ; and a process for producing the substantially light-insensitive thermographic material comprising the steps of: coating the support with a subbing layer-composition thereby forming the subbing layer; producing one or more aqueous coating compositions together containing the substantially light-insensitive organic silver salt, the reducing agent and the binder; and applying the one or more aqueous coating compositions to the same side of the support as the subbing layer thereby forming after drying the thermosensitive element.