| http://www.w3.org/ns/prov#value | - C. or more in order to soften PVA, ADC, and the like fixed to the recovered emitting phosphor.Examples of an alkali are NaOH, KOH, LiOH, and NH.sub.4 OH. An addition amount of an alkali is preferably 1.0 wt % or more, and more preferably, 2.0 wt % or more with respect to a dry solid component in the phosphor slurry.A dry solid component amount of a phosphor slurry except for a phosphor normally re
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