Explanatory notes
… or scrap. 2.- In this Chapter the word “photographic” relates to the process by which visible images are formed, … radiation having sufficient energy to cause the necessary reaction in photon (or photo) sensitive materials, i.e., … as well as particle (or nuclear) radiation, whether for reproduction in monochrome or colour. Certain plates are, …Legal note
… or scrap. 2.- In this Chapter the word “photographic” relates to the process by which visible images are formed, directly or indirectly, by the action of light or other …