| http://www.w3.org/ns/prov#value | - In a so-called black matrix type cathode-ray tube, dots or stripes of a black substance such as carbon or black chromium are formed on the inner surface of a faceplate beforehand, and then the above steps are repeatedlyperformed to form a phosphor screen.Since an amount of a phosphor washed away in the above slurry method is about 70% or more of a used phosphor amount, a washed away portion of the
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