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Post by decentguy on Nov 9, 2022 1:33:24 GMT
Has anyone seen the George Washington 6 Cents in that brownish look?!  |
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Ryan
Member 
Calgary, Alberta, Canada
Posts: 2,722 
What I collect: If I have a catalogue for it, I collect it. And I have many catalogues ....
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Post by Ryan on Nov 9, 2022 3:24:45 GMT
This stamp has a characteristic look of a chemical effect in which pollutants in the atmosphere (in this case, sulphur) react with pigments in the stamp ink which contain iron or lead. This particular stamp is one that is often seen with discolouration. Take a look at this previous thread on TSF for a bit of discussion on the subject. Ryan |
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Post by decentguy on Nov 9, 2022 4:15:30 GMT
Cheers mate its exactly what I thought! but do you think the black ink on the pre-cancelled had also been affected in the same way by whatever factors it caused it to be brownish?
Roni
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Ryan
Member
Calgary, Alberta, Canada
Posts: 2,722
What I collect: If I have a catalogue for it, I collect it. And I have many catalogues ....
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Post by Ryan on Nov 9, 2022 6:02:31 GMT
I haven't seen precancel ink change due to contamination, no. This Washington stamp is prone to it, as is one of the Garfield orangeish / brownish stamps from the same rough era, as I recall. And I have a bunch of Newfoundland stamps in a relatively dark red which often end up lead-coloured, whereas I've never seen that on similar Canadian (or British) stamps from the same era, even though they appear to be a very similar colour. Either they use a different ink chemistry or cod fishing puts something in the air ... ha ha
Ryan
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Post by decentguy on Nov 9, 2022 6:35:37 GMT
Hahaha.... its something in the air alright !!  ... Thank You Ryan I appreciate your feedback and your knowledge Roni |
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... Thank You Ryan I appreciate your feedback and your knowledge