Patent ID: 6348293
Filing Date: 2002-02-19
Classification: G03C,Y10S

Abstract:
Radiographic silver halide film material comprising a transparent film support having first and second major surfaces coated with a subbing layer, optionally overcoated with an antihalation undercoat, further coated adjacent to said subbing layer or said antihalation layer, on each side of said film support a light-sensitive silver halide emulsion overcoated with a protective antistress layer, said emulsion layer having chemically and spectrally sensitized {111} tabular hexagonal grains or crystals having silver iodide in an amount of at most 3 mole %, based on silver, covering at least 50% of the total projective surface of all grains, the said tabular grains having a mean equivalent volume diameter of from 0.3 &mgr;m up to 1.0 &mgr;m and an average grain thickness of less than 0.30 &mgr;m, wherein said film material is coated with a total amount of silver halide, expressed as an equivalent amount of silver nitrate of less than 7 g/m2, characterized in that said protective antistress layer, said antihalation undercoat or both said protective antistress layer and said antihalation undercoat comprise, in an amount of at least 0.5 mmole per mole of silver halide coated, a N-amino mercapto-triazole compound according to formula (I): wherein M represents a hydrogen atom, an alkali metal atom or an ammonium group; and, wherein R3 represents hydrogen, an alkylene, alkenylene, alkynylene, arylene, heteroarylene, and wherein R1 and R2 together represent a double bond further independently substituted as R3 and wherein, at least one of R1/R2 or R3, contains one or more alkali soluble group(s).