Phosphors for colour television
      Phosphors for colour display tubes
      Phosphors for black & white television and display tubes
      Low voltage cathodoluminescent phosphors for conventional VFD
      Low voltage cathodoluminescent phosphors for VFD of novel type
      Cathodoluminescent phosphors for projection
      Phosphors for electron-beam devices with high resolution
      Powdered electroluminescent materials
      Narrow-band lamp phosphors
      Phosphors for gas-discharge panels
      Thermoindicators of melting in temperature range from 117 to 2152°C
      Nothing of the above listet materials is interesting

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