JPS5499373A - Method of formation of fluorescent substance layer for bulb - Google Patents

Method of formation of fluorescent substance layer for bulb

Info

Publication number
JPS5499373A
JPS5499373A JP593878A JP593878A JPS5499373A JP S5499373 A JPS5499373 A JP S5499373A JP 593878 A JP593878 A JP 593878A JP 593878 A JP593878 A JP 593878A JP S5499373 A JPS5499373 A JP S5499373A
Authority
JP
Japan
Prior art keywords
fluorescent substance
substance
lacquer
dispersing agent
soluble
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP593878A
Other languages
Japanese (ja)
Other versions
JPS6243301B2 (en
Inventor
Hitoshi Yamazaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP593878A priority Critical patent/JPS5499373A/en
Publication of JPS5499373A publication Critical patent/JPS5499373A/en
Publication of JPS6243301B2 publication Critical patent/JPS6243301B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

PURPOSE: To prevent the reduction of radiation efficiency by forming uniform fluorescent substance layer without effecting special forced sispersion means in case the fluorescent substance coating film is formed by coating the liquid, in which powder of fluorescent substance is suspended in soluble lacquer, on the inner surface of bulbes and dring it.
CONSTITUTION: Fluorescent coating film is formed by painting suspension of fluorescent substance, obtained by suspending fluorescent substance in soluble lacquer obtained by dissolving soluble macromolecular organic substance into water and adding polycarboxylic acid ammonium salt as dispersing agent, on the inner surface of the bulbes and dry it afterwards forcively under a defined constant condition. After that, the said bulb is heated and organic macromolecular substance, which is a material of lacquer and remained in the film of fluorescent substance, and said dispersing agent is burnt and removed. According to this method, it is possible to increase the dispersibility of fluorescent substance in soluble lacquer by dispersing agent, accordingly, it is possible to dissolve to pulverize particles of fluorescent substance into much more finer grains than necessitated by effecting special forced dispersion means in order to increase the dispersibility.
COPYRIGHT: (C)1979,JPO&Japio
JP593878A 1978-01-23 1978-01-23 Method of formation of fluorescent substance layer for bulb Granted JPS5499373A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP593878A JPS5499373A (en) 1978-01-23 1978-01-23 Method of formation of fluorescent substance layer for bulb

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP593878A JPS5499373A (en) 1978-01-23 1978-01-23 Method of formation of fluorescent substance layer for bulb

Publications (2)

Publication Number Publication Date
JPS5499373A true JPS5499373A (en) 1979-08-06
JPS6243301B2 JPS6243301B2 (en) 1987-09-12

Family

ID=11624831

Family Applications (1)

Application Number Title Priority Date Filing Date
JP593878A Granted JPS5499373A (en) 1978-01-23 1978-01-23 Method of formation of fluorescent substance layer for bulb

Country Status (1)

Country Link
JP (1) JPS5499373A (en)

Also Published As

Publication number Publication date
JPS6243301B2 (en) 1987-09-12

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