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All Forums Category: General Philatelic Discussions (Non Country Specific) Forum: Philatelic Book, Reference, Supply and Software

Watermark Detecting Question

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Replies: 6 / Views: 1,148

New Member

United States

3 Posts

Posted 01/11/2020 1:06 pm

Just curious but doesn't putting a MNH stamp in detecting fluid ruin the gum on the stamp?

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Pillar Of The Community

United States

763 Posts

Posted 01/11/2020 1:29 pm

No, it does not.

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Pillar Of The Community

United Kingdom

895 Posts

Posted 01/11/2020 4:11 pm

Probably affects it a little, if you were to view it under a microscope, but as no-one is concerned, there's no issue.

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Pillar Of The Community

United States

713 Posts

Posted 01/11/2020 9:03 pm

If the gum is water activated then the petroleum based lighter fluid (and benzene and other such) will not react with it. (Clarity watermark fluid will not react with water based gum either.) This is why collectors have been using these products for 100 plus years.

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Pillar Of The Community

United States

1115 Posts

Posted 01/12/2020 11:36 am

Its a question of solubility. Water-based gum won't be soluble in the organic chemical detection fluids, so there's no effect.

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Pillar Of The Community

United States

1106 Posts

Posted 01/12/2020 1:17 pm

If you want a more technical description of why watermark fluid and lighter fluid won't damage gum, read Ray.mac's post in this thread:

https://goscf.com/t/12778

Dan

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Experienced stamps need a home too. I'd rather have an example that is imperfect than no example.
I collect for enjoyment, not investment.
APS Member #223433
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Meter Stamp Society Member #1409

New Member

United States

3 Posts

Posted 01/12/2020 6:50 pm

Thanks everyone

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Replies: 6 / Views: 1,148

All Forums Category: General Philatelic Discussions (Non Country Specific) Forum: Philatelic Book, Reference, Supply and Software

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