BE406816A - - Google Patents

Info

Publication number
BE406816A
BE406816A BE406816DA BE406816A BE 406816 A BE406816 A BE 406816A BE 406816D A BE406816D A BE 406816DA BE 406816 A BE406816 A BE 406816A
Authority
BE
Belgium
Prior art keywords
indicator substance
water vapor
indicator
blue
paper
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE406816A publication Critical patent/BE406816A/fr

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K5/00Light sources using charges of combustible material, e.g. illuminating flash devices
    • F21K5/02Light sources using charges of combustible material, e.g. illuminating flash devices ignited in a non-disrupting container, e.g. photo-flash bulb

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
BE406816D BE406816A (2)

Publications (1)

Publication Number Publication Date
BE406816A true BE406816A (2)

Family

ID=71738

Family Applications (1)

Application Number Title Priority Date Filing Date
BE406816D BE406816A (2)

Country Status (1)

Country Link
BE (1) BE406816A (2)

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