Abstract: A phosphor layer is formed on an inside surface of a panel of a glass bulb comprising the panel and funnel connected with each other. A nozzle sprays an organic solvent lacquer on the phosphor layer to form a lacquer intermediate film under conditions ofa/2.ltoreq.L.multidot.tan (.THETA./2).ltoreq.(a/2)+.alpha.(0.ltoreq..alpha. )where,a is the length of the short side of the inside surface of the panel,L is the length from the connecting portion of the panel and funnel to the nozzle in the direction of spray,.THETA.0 is the angle of spray of the nozzle, and.alpha. is a length addition parameter. The lacquer intermediate film formed on the inside surface of the funnel is removed by a liquid.

Abstract: A method of forming a phosphor layer of a fluorescent screen of a CRT, having a good screen quality by properly managing the dissolution of a water glass and barium acetate occurring in a covering water step and improve the uniformity. A phosphor layer is formed on an inner surface of a panel portion of a glass bulb by a precipitation process and a lacquer intermediate film is formed on the phosphor layer in a state where the phosphor layer is moistened by covering water. An electrolyte remaining in the phosphor layer after the phosphor layer is moistened by the covering water has a conductivity of 6.0.+-.4.0 .mu.s/cm in 200 ml of pure water of 20.degree. C..+-.1.degree. C.