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Thema: AIRGRAPH, WW2: color depth( picture wash reason?

  1. #1
    L ChinasStempelkollektor
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    05.2009
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    Ich bin ein Sammler in China, 42 Jahre alt, verheiratet, die in Bibliotheken in der Provinz Qinghai.
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    AIRGRAPH, WW2: color depth( picture wash reason?

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    Hello,
    AIRCRAFT, WW2
    These 2 AIRGRAPH, their color depth (picture wash reason?),
    My question is:
    1, These 2 AIRGRAPH, their color depth is picture wash, the reasons for the use fixing bath?
    2, AIRGRAPH, The use of time (start, and end)
    I, need to be connected Internet, or wikipedia
    Thanks extremely
    Geändert von L ChinasStempelkollektor (09.03.2016 um 16:51 Uhr)

  2. #2
    Weltenbürger Avatar von Rainer Fuchs
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    06.2004
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    Himmelstadt
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    2.917
    AirGraphs were in fact photos developed form Microfilmed messages. Given the time period it would not make me wonder if the fixing bath to develop the photos did differ some times, causing the colour differences. On the other hand, out of the images it is difficult to determine f the different colour comes from the fixing bath or from the paper used, or a combination of both.

    In regard to the time period when they have been introduced/used, i need to check my archive as I ones wrote an article in German language on them.

    You may also check the Website:
    http://www.airgraph.com/
    Mitglied bei:
    BDPh, APS, RPSL (FRSPL), SG-Lateinamerika, FG Indien, AROS, NTPSC, ONEPS, COPAPHIL etc...

    Sammelgebiete:

  3. #3
    Registrierter Benutzer Avatar von Sittingmanni
    Registriert seit
    03.2012
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    NRW
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    This might be of some help to you.

    http://alphabetilately.org/airgraph.html

  4. #4
    L ChinasStempelkollektor
    Registriert seit
    05.2009
    Ort
    Ich bin ein Sammler in China, 42 Jahre alt, verheiratet, die in Bibliotheken in der Provinz Qinghai.
    Beiträge
    424
    Zitat Zitat von Rainer Fuchs Beitrag anzeigen
    AirGraphs were in fact photos developed form Microfilmed messages. Given the time period it would not make me wonder if the fixing bath to develop the photos did differ some times, causing the colour differences. On the other hand, out of the images it is difficult to determine f the different colour comes from the fixing bath or from the paper used, or a combination of both.

    In regard to the time period when they have been introduced/used, i need to check my archive as I ones wrote an article in German language on them.

    You may also check the Website:
    http://www.airgraph.com/
    Hello,
    thank you very much for your help!

  5. #5
    L ChinasStempelkollektor
    Registriert seit
    05.2009
    Ort
    Ich bin ein Sammler in China, 42 Jahre alt, verheiratet, die in Bibliotheken in der Provinz Qinghai.
    Beiträge
    424
    Zitat Zitat von Sittingmanni Beitrag anzeigen
    This might be of some help to you.

    http://alphabetilately.org/airgraph.html
    Hello,
    thank you very much for your help!

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