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Iran / Persia stamps gum problem

worldphila 100% (1749x)

364 berichten

Israël
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
- Aangemaakt 18 aug 2024 op 12:53 (#1784913)
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wycombe1 100% (85578x)

1894 berichten

Verenigd Koninkrijk
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'.
- Aangemaakt 20 aug 2024 op 02:18 (#1785534)
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worldphila 100% (1749x)

364 berichten

Israël
wycombe1

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'.

Aangemaakt 20 aug 2024 op 02:18

#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?
- Aangemaakt 20 aug 2024 op 07:12 (#1785645)
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winnipeg 100% (5700x)

189 berichten

Canada
Checked out similar set sold on E on August 5,the gum on that set is completely different.
- Aangemaakt 20 aug 2024 op 10:36 (#1785729)
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winnipeg 100% (5700x)

189 berichten

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.
- Aangemaakt 20 aug 2024 op 10:43 (#1785735)
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worldphila 100% (1749x)

364 berichten

Israël
winnipeg

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.

Aangemaakt 20 aug 2024 op 10:43

#1785735
Many thanks for your help.
- Aangemaakt 20 aug 2024 op 11:27 (#1785768)
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worldphila 100% (1749x)

364 berichten

Israël
winnipeg

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.

Aangemaakt 20 aug 2024 op 10:43

#1785735
Many thanks for your help.
- Aangemaakt 20 aug 2024 op 11:27 (#1785771)
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worldphila 100% (1749x)

364 berichten

Israël
winnipeg

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.

Aangemaakt 20 aug 2024 op 10:43

#1785735
Many thanks for your help.
- Aangemaakt 20 aug 2024 op 11:27 (#1785774)
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worldphila 100% (1749x)

364 berichten

Israël
winnipeg

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.

Aangemaakt 20 aug 2024 op 10:43

#1785735
Many thanks for your help.
- Aangemaakt 20 aug 2024 op 11:27 (#1785777)
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worldphila 100% (1749x)

364 berichten

Israël
winnipeg

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.

Aangemaakt 20 aug 2024 op 10:43

#1785735
Many thanks for your help.
- Aangemaakt 20 aug 2024 op 11:27 (#1785780)
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worldphila 100% (1749x)

364 berichten

Israël
winnipeg

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.

Aangemaakt 20 aug 2024 op 10:43

#1785735
Many thanks for your help.
- Aangemaakt 20 aug 2024 op 11:27 (#1785783)
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worldphila 100% (1749x)

364 berichten

Israël
winnipeg

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.

Aangemaakt 20 aug 2024 op 10:43

#1785735
Many thanks for your help.
- Aangemaakt 20 aug 2024 op 11:27 (#1785786)
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Iran / Persia stamps gum problem