This standard is applicable to the phosphor powder used for the green primary color display of color picture tubes.
GB/T 4779.1-1984 history
2015GB/T 5838.44-2015 Phosphors.Part 4-4:Phosphor for color picture tubes
1984GB/T 4779.1-1984 Phosphors for color picture tubes use--Phosphor Y22-G3
GB/T 4779.1-1984 Phosphors for color picture tubes use--Phosphor Y22-G3 was changed to GB/T 5838.44-2015 Phosphors.Part 4-4:Phosphor for color picture tubes.