Thermographic imaging element

摘要

A thermographic imaging element comprises: (a) a support; (b) an imaging layer comprising: (i) a silver salt; (ii) a first reducing agent which has high activity with an activation energy of less than 10 Joules/sq.cm.; (iii) a second reducing agent which has low activity with an activation energy of greater than or equal to 10 Joules/sq. cm.; and (iv) a third reducing agent comprising a silicon compound containing at least one silicon-hydrogen bond.