Thermographic recording material with improved image tone and/or stability upon thermal development
申请人:AGFA-GEVAERT N.V.
公开号:EP0848286A1
公开(公告)日:1998-06-17
A recording material comprising a support and a thermosensitive element comprising silver behenate, an organic reducing agent therefor in thermal working relationship therewith and a binder, characterized in that the silver behenate is not associated with mercury and/or lead ions and when the recording material is irradiated with a copper Kα1 X-ray source the ratio, normalized to a quantity of silver in the recording material of 1g per m2 thereof, of the sum of the peak heights of the X-ray diffraction lines attributable to silver behenate at Bragg angles, 2Θ, of 6.01°, 7.56°, 9.12°, 10.66°, 12.12° and 13.62° to the sum of the peak heights of the X-ray diffraction lines at Bragg angles, 2Θ, of 25.60°, 35.16° and 43.40° of NIST standard 1976, rhombohedral Al2O3, determined with the same X-ray diffractometer in the same state of adjustment, is greater than 0.85; production processes for particles of substantially light-insensitive organic silver salt comprising silver behenate with these X-ray characteristics in the presence and substantial absence of organic solvent.
一种记录材料,包括一个支架和一个热敏元件,热敏元件包括山嵛酸银、一种与之有热工作关系的有机还原剂和一种粘结剂,其特征在于山嵛酸银不与汞和/或铅离子相关联,当用铜Kα1 X射线源照射记录材料时,以记录材料中每平方米1克银的量为标准,在布拉格角2Θ处山嵛酸银的X射线衍射线峰高之和与布拉格角2Θ处X射线衍射线峰高之和的比值分别为6.01°、7.56°、9.12°、10.66°、12.12°和13.62°。在相同的调整状态下,使用相同的 X 射线衍射仪测定的 NIST 1976 年标准斜方体 Al2O3 在布拉格角 2Θ 为 25.60°、35.16° 和 43.40°处的 X 射线衍射线峰高度之和,大于 0.01°、7.56°、9.12°、10.66°、12.12° 和 13.62°;在相同的调整状态下,使用相同的 X 射线衍射仪测定的 NIST 1976 年标准斜方体 Al2O3 在布拉格角 2Θ 为 25.60°、35.16° 和 43.40°处的 X 射线衍射线峰高度之和,大于 0.01°、7.56°、9.12°、10.66°、12.12° 和 13.62°。85;在有机溶剂存在和基本不存在的情况下,具有这些 X 射线特性的由山嵛酸银组成的基本不感光有机银盐颗粒的生产工艺。