There are three layers of emulsion containing fine, light-sensitive grains of silver halide. The grains in the top layer are sensitive to blue light; those in the middle are sensitive to green ...

Explain why, in a test for halide ions, the sample is acidified with dilute nitric acid first. Carbonate ions also produce a white precipitate with silver nitrate solution. The acid reacts with ...

Chinese lens manufacturer Light Lens Lab has announced a major project to develop new photographic films. The lens maker, which produces lenses for Leica M and Leica screw-mount cameras, made the ...