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US 5,688,636 AGranted
Ttype of dye in photographic materials
AssigneeAgfa-Gevaert
InventorEric Kiekens
Life of this patent
Estimating the term…
Abstract
A new type of yellow dyes with general formula Q--CO--CO--X is disclosed. They can be used in photographic materials as antihalation dyes, acutance dyes or filter dyes. Preferably they are incorporated in UV sensitive contact materials for pre-press applications.
Claims7
Photographic material comprising a support, at least one silver halide emulsion layer and optionally one or more other hydrophylic layer(s) wherein at least one of said emulsion layer(s) or other hydrophylic layer(s) contains a dye represented by following general formula (I):
- Q--CO--CO--X (I)
- wherein Q represents a substituted or unsubstituted carbocyclic aromatic or hetero-aromatic ring, and --X represents --N(R.sup.1)(R.sup.2) or --OR.sup.3, wherein each of R.sup.1, R.sup.2 and R.sup.3 independently represents H, substituted or unsubstituted alkyl or substituted or unsubstituted aryl, with the proviso that at least one of the R groups or a substituent of Q contains a water- or alkali-solubilising group.
Dependencies are inferred from the claim text.