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Cathode Ray Tubes are made of a faceplate

Cathode Ray Tubes are made of a faceplate (containing lead or barium) welded to a cone glass by a frit. The tubes contain lead encapsulated in glass that can be released if the glass is broken. Therefore, the entrepreneur is advised to leave the responsibility of treating tubes to specialised enterprises. Indeed, the staff carrying out the mechanical separation of glass must be protected from inhaling the dust released when the tubes are broken, because they may contain lead or barium oxide. Moreover, the fluorescent coating on the faceplate may present inhalation risks if they are handled in a dry state. This is why wet processes are often used to remove the phosphor particles.