Brief description of the detection of defects during the manufacture of the screen of a tube of a color television

摘要

Method of manufacture of the screen of a cathode ray tube has a color, of the type a perforated mask, during which each phosphorus, or graphite, in solution with a photosensitive material cured after exposure to an ultra - violet radiation is applied on the inner face 10 of the slab of the tube, this solution is then eliminated of the rim of the slab by means of a washing liquid, then the surface - screen is exposed to uv radiation at the locations or should be the phosphorus or graphite, and then the face - screen is cleaned so that it remains that phosphorus or graphite to the locations subjected to uv radiation. / p & & p & the washing liquid 13 of the rim of the slab is of eosin opaque to the uv radiation, and constitutes a dye for the coating of the glass of the face - screen so that the projections of the washing liquid on the solution rise to defects are clearly visible after development.