| Answer | Crossword Clue |
|---|---|
| PATINA | Film caused by oxidation |
| photooxidation | Oxidation caused by the action of light |
| PATINA | Film produced by oxidation. |
| PATINA | Green film produced by oxidation |
| patinas | A green or brown film on the surface of bronze or similar metals, produced by oxidation over a long period |
| halation | blurred effect around the edges of highlight areas in a photographic image caused by reflection and scattering of light through the emulsion from the back surface of the film support or plate |
