Latent image stability using alkynylamines and iodide emulsions

The invention relates to a photographic element wherein at least one layer comprises silver halide grains wherein said grains have a surface iodide of less than 0.6 mol percent, total grain iodide of about 1.0 to 10 mol percent, said iodide being introduced in the core of the grains, an alkynylamine compound of Formula I: wherein X represents oxygen, sulfur, selenium, or an unsubstituted or alkyl substituted nitrogen; R1 represents hydrogen or an alkyl of from 1 to 5 carbon atoms, and R2 represents hydrogen, or an alkyl, aryl, heteroaryl, carbocyclic or heterocyclic group, and R3 and R4 independently represent hydrogen, halogen, or a substituted or unsubstituted alkyl or alkoxy group, preferably one having fewer than 6 carbon atoms, and the reductone of Formula II wherein R1 and R2 are the same or different, and may represent H, alkyl, cycloalkyl, aryl, or an alkyl group with a solubilizing group such as -OH, sulfonamide, sulfamoyl, or carbamoyl, R1 and R2 may be joined to complete a heterocyclic ring, R4 and R5 are H, OH, alkyl, aryl, cycloalkyl, or may together represent an alkylidene group, n is 1 or 2 and R3 is H, alkyl, aryl, or CO2R6 where R6 is alkyl, and wherein the logarithm of the partition coefficient for the reductone when equilibrated as a solute between n-octanol and water (logP) is less than 0.293.