GB446765A - Improved fluorescent materials and fluorescent screens made therewith - Google Patents

Improved fluorescent materials and fluorescent screens made therewith

Info

Publication number
GB446765A
GB446765A GB33251/34A GB3325134A GB446765A GB 446765 A GB446765 A GB 446765A GB 33251/34 A GB33251/34 A GB 33251/34A GB 3325134 A GB3325134 A GB 3325134A GB 446765 A GB446765 A GB 446765A
Authority
GB
United Kingdom
Prior art keywords
fluorescent
particles
nov
binder
protective
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.)
Expired
Application number
GB33251/34A
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.)
Chemische Fabrik Von Heyden AG
Original Assignee
Chemische Fabrik Von Heyden AG
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 Chemische Fabrik Von Heyden AG filed Critical Chemische Fabrik Von Heyden AG
Publication of GB446765A publication Critical patent/GB446765A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/56—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing sulfur
    • C09K11/562—Chalcogenides
    • C09K11/565—Chalcogenides with zinc cadmium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)
  • Luminescent Compositions (AREA)

Abstract

446,765. Fluorescent screens. CHEMISCHE FABRIK VON HEYDEN AKT.- GES., Radebeul, Dresden, Germany. Nov. 19, 1934, No. 33251. Convention date, Nov. 18, 1933. [Class 98 (i)] Fluorescent materials such as zinc sulphide and zinc cadmium sulphide, which blacken on exposure to daylight, are treated to coat each individual particle with a thin, protective, coloured layer by suspending the particles in a dilute solution of a film-forming material containing a protective colouring agent, filtering, and drying the residual. coated particles. As colouring agents, dyestuffs are used which are found to be effective for preventing blackening of the particular fluorescent materials employed. In examples, particles of zinc cadmium sulphide are coated by suspension in a dilute-solution of water-glass containing Auramine, or Auramine and Brilliant Green. The screen layer is prepared in known manner from the coated particles mixed with a binder such as a cellulose ester. Reference is made to known fluorescent layers in which the fluorescent material is itself coloured or is mixed with a binder to which colouring matter has been added ; and also to the addition of cobalt to lithopones.
GB33251/34A 1933-11-18 1934-11-19 Improved fluorescent materials and fluorescent screens made therewith Expired GB446765A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE446765X 1933-11-18

Publications (1)

Publication Number Publication Date
GB446765A true GB446765A (en) 1936-05-06

Family

ID=6537923

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33251/34A Expired GB446765A (en) 1933-11-18 1934-11-19 Improved fluorescent materials and fluorescent screens made therewith

Country Status (1)

Country Link
GB (1) GB446765A (en)

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