Agfa Gevaert Nv

Noel Hosten

Johan August Loccufier

Jean-Marie O Dewanckele

Pierre Jean De Clercq

Dirk Van Haver

Stefaan Lingier

Sabine Emmers

A silver halide photographic material is disclosed containing a new type of hydrazide compounds represented by following general formula I, the different symbols of which are defined in the description. ##STR1## In a preferred embodiment Q is chosen from pyridinium, quinolinium or isoquinolinium. In a most preferred embodiment Q is a pyridinium substituted on the N.sup.+ with a C.sub.5 to C.sub.8 alkyl group. The photographic material is preferably a graphic arts recording material. High gradation and excellent hard dot quality are obtained.

Photographic material containing a new hydrazide type

A photographic element is disclosed containing a compound capable of releasing image-wise a photographic useful group (PUG) based on a mechanism involving radical formation under development conditions and splitting of a homolytically labile bond. In a preferred embodiment the compound capable of releasing the PUG is a hydrazine derivative or a 1-aryl-3-pyrazolidinone derivative.

Photographic useful group releasing system

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Brugge, Belgium

Noel Hosten