stannous sulphide
1Fogging (photography) — Fogging in photography is the deterioration in the quality of the image caused either by extraneous light or the effects of a processing chemical.Taxonomy of foggingOne kind of fog is produced from a silver halide crystal having a fog centre… …
2stannite — /ˈstænaɪt / (say stanuyt) noun 1. a mineral, copper iron tin sulphide, Cu2FeSnS4, an ore of tin, iron black to steel grey in colour, with a metallic lustre; tin pyrites. 2. Chemistry a salt of stannous acid. {Late Latin stannum + ite1} …
