Abstract: A photosensitive film on a glass surface is prepared by: dispensing a quantity of aqueous emulsion containing the film constituents on the surface, distributing the emulsion as a layer over the surface, leveling the distributed layer and then drying the layer. To burst any bubbles that form during distribution, and to remove residual effects of the bubbles, a mist of a surface-tension-reducing liquid, such as methyl alcohol, is contacted with the distributed layer during leveling.

Abstract: In a method for preparing a luminescent screen which includes optionally depositing a light-absorbing matrix upon a support, depositing a phosphor-and-binder layer on the support, and then coating the phosphor layer with a film of organic polymeric material, the steps for salvaging the support and matrix, if present, substantially undisturbed while substantially entirely removing the overlying material. In the method, the overlying material is contacted with an aqueous hydroxide-and-peroxide solution until the binder and film are at least partially solubilized. Then, the overlying material is substantially entirely flushed away by flushing, sloshing, or low-pressure spraying with an aqueous medium.