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All Forums Category: US Stamps and Covers Discussions Forum: US Classic Stamps - As Issued and Used

#328 Blue Color, Chemistry?

 
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Author Previous TopicReplies: 4 / Views: 862Next Topic  
megawat
Valued Member

United States
6 Posts
Posted 04/11/2025   11:21 am  Show Profile Bookmark this topic Add megawat to your friends list Get a Link to this Message
Two #328 scanned together, one normal and one blue. How is such a radical color change possible?
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txstamp
Pillar Of The Community
United States
3507 Posts
Posted 04/11/2025   11:27 am  Show Profile Bookmark this reply Add txstamp to your friends list  Get a Link to this Reply
https://stampsmarter.org/learning/A...gelings.html

Color changelings.
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John Becker
Pillar Of The Community
6347 Posts
Posted 04/11/2025   11:29 am  Show Profile Bookmark this reply Add John Becker to your friends list  Get a Link to this Reply
yellow + blue = green.
The red/yellow end of the spectrum is more light/chemical sensitive, such that green stamps being intentionally or unintentionally alter/damaged to appear blue is not uncommon.
Your "blue" stamp is damaged and not an error/freak/oddity.
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Partime
Moderator
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United States
5105 Posts
Posted 04/11/2025   8:06 pm  Show Profile Bookmark this reply Add Partime to your friends list  Get a Link to this Reply
Perhaps we should create a sub-forum strictly about possible color changelings. Then we can refer all questions there.
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sigistenz
Valued Member
Belgium
149 Posts
Posted 04/12/2025   11:31 am  Show Profile Bookmark this reply Add sigistenz to your friends list  Get a Link to this Reply
Do let's
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  Previous TopicReplies: 4 / Views: 862Next Topic  
All Forums Category: US Stamps and Covers Discussions Forum: US Classic Stamps - As Issued and Used
 
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