A photothermographic element capable of providing an image density that exceeds background fog by at least 1.2 optical density units comprising a support bearing at least one photothermographic medium comprising:
(a) a photosensitive silver halide;
(b) a non-photosensitive, reducible silver source;
(c) a reducing agent for the non-photosensitive, reducible silver source;
(d) a toner; and
(e) a binder;
in which the reducing agent comprises a hydroxamic acid compound, and in which the toner comprises a mixture of phthalazine and a phthalic acid derivative.
一种光热成像元件,能够提供超过背景雾至少 1.2 个光密度单位的图像密度,包括一个承载至少一种光热成像介质的支架,该介质包括
(a) 感光卤化
银;
(b) 非光敏的可还原
银源;
(c) 用于非感光可还原
银源的还原剂;
(d) 调色剂;和
(e) 粘合剂;
其中还原剂包括羟
肟酸化合物,调色剂包括
酞嗪和
邻苯二甲酸衍
生物的混合物。