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Iran / Persia stamps gum problem

  • worldphila
    worldphila 100% (1797x)
    standard

    368 messages

    Israel

    I have some Iranian full sets.
    This one is an 1950 set.
    The problem is the gum side. The gum has a dark color like stain.
    I have thousands of mint stamps from other countries. Some are stained. But this is a different kind of stain.
    Probably the problem was the kind of the gum? Have more iranian sets with the same problem.
    Interesting that this kind of stain (not like the regular stain) is not affecting other stamps that are mounted on the same album page.
    Any knowledge about this problem? including value.
    Thanks
    board board
  • wycombe1
    wycombe1 100% (86895x)
    premium

    1911 messages

    United Kingdom

    In the past they have been stored in a humid environment which has 'tropicalised' the gum and turned it brittle and brown. It looks like you may also have a fungal infection in the gum as well known as 'foxing'.
  • worldphila
    worldphila 100% (1797x)
    standard

    368 messages

    Israel

    In the past they have been stored in a humid environment which has 'tropicalised' the gum and turned it brittle and brown. It looks like you may also have a fungal infection in the gum as well known as 'foxing'.
    • Created on Aug 20, 2024 at 2:18 AM
    • #1785534
    Many thanks
    I know about fungus stains. A fungus stain has also an affect on the front side of the stamp. This's not the case. Probably an acid gum.
    My question is also if these stamps could be kept without this affect?
    Or the gum was removed and these kind of mint stamps have a new gum coat?
  • winnipeg
    winnipeg 100% (5780x)
    free

    191 messages

    Canada

    Checked out similar set sold on E on August 5,the gum on that set is completely different.
  • winnipeg
    winnipeg 100% (5780x)
    free

    191 messages

    Canada

    Have just checked here in sold items and one set have a pretty similar glue as yours.You probably have to look for forums about Iranian stamps to find more information.
  • worldphila
    worldphila 100% (1797x)
    standard

    368 messages

    Israel

    Have just checked here in sold items and one set have a pretty similar glue as yours.You probably have to look for forums about Iranian stamps to find more information.
    • Created on Aug 20, 2024 at 10:43 AM
    • #1785735
    Many thanks for your help.
  • worldphila
    worldphila 100% (1797x)
    standard

    368 messages

    Israel

    Have just checked here in sold items and one set have a pretty similar glue as yours.You probably have to look for forums about Iranian stamps to find more information.
    • Created on Aug 20, 2024 at 10:43 AM
    • #1785735
    Many thanks for your help.
  • worldphila
    worldphila 100% (1797x)
    standard

    368 messages

    Israel

    Have just checked here in sold items and one set have a pretty similar glue as yours.You probably have to look for forums about Iranian stamps to find more information.
    • Created on Aug 20, 2024 at 10:43 AM
    • #1785735
    Many thanks for your help.
  • worldphila
    worldphila 100% (1797x)
    standard

    368 messages

    Israel

    Have just checked here in sold items and one set have a pretty similar glue as yours.You probably have to look for forums about Iranian stamps to find more information.
    • Created on Aug 20, 2024 at 10:43 AM
    • #1785735
    Many thanks for your help.
  • worldphila
    worldphila 100% (1797x)
    standard

    368 messages

    Israel

    Have just checked here in sold items and one set have a pretty similar glue as yours.You probably have to look for forums about Iranian stamps to find more information.
    • Created on Aug 20, 2024 at 10:43 AM
    • #1785735
    Many thanks for your help.
  • worldphila
    worldphila 100% (1797x)
    standard

    368 messages

    Israel

    Have just checked here in sold items and one set have a pretty similar glue as yours.You probably have to look for forums about Iranian stamps to find more information.
    • Created on Aug 20, 2024 at 10:43 AM
    • #1785735
    Many thanks for your help.
  • worldphila
    worldphila 100% (1797x)
    standard

    368 messages

    Israel

    Have just checked here in sold items and one set have a pretty similar glue as yours.You probably have to look for forums about Iranian stamps to find more information.
    • Created on Aug 20, 2024 at 10:43 AM
    • #1785735
    Many thanks for your help.

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