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UK - 2nd - Nobel Prize 100th Anniversary - 2001
Stamp Photos
No: 144   Contributor: Jean Pryer   Year: 2001   Country: United Kingdom
UK - 2nd - Nobel Prize 100th Anniversary - 2001

UK - 2nd - Nobel Prize 100th Anniversary - 2001

Second class stamp.
Chemistry

Close up from first day cover in picture #143
Picture added on 20 August 2009 at 11:21
add commentComments:
I have three of this stamp, but one of them changes colour when you warm up the ink with your finger. Does anyone have any idea why one of the stamps does this, yet the other two are just plain?

Added by Sarah on 17 February 2012.
Hi Sarah, we found a website that suggests that some stamps were issued with thermochromic ink:
http://retrievia.wordpress.com/2008/01/06/the-stamp-of-the-chemistry-nobel-prize/

Added by Stamps Editor on 17 February 2012.
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