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Stamps (Philately)/One cent McKinley postcard


Hello Mark,

Trying to find out what material these cards are made of and what you think would be the best way to
Clean one that is fairly dirty, from lying on a board in a ceiling since about 1917. Trying to find out what.
Message says  to be able to confirm other information. The card seems to be fairly tough, is not made
Of the same lightweight material as today's cards

Thank you, Randolph


Postal cards are essentially paper product, so any kind of water based cleaner will cause the fibers to weaken and warp.  Dust will wipe off with a dry rag, but unfortunately there is no solution for "freshening" a card that shows aging from exposure.

-Mark Leon

I deal in United States Stamps
American Art Glass
and Halloween Costumes!

Stamps (Philately)

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Mark Leon


I am a collector of United States postage stamps, and also a stamp dealer. I`m a member of the American Philatelic Society (APS). My principle area of interest and expertise is in United States Stamps.


I've been selling stamps on the internet since early 1996. I maintain a stamp web page that concentrates on mint US stamps issued generally between 1890 and 2009. I'm an active seller on since 1996, under the user id "mleon". You can find my web page at

I have a Bachelor of Science degree in computer science from the University of Nevada at Las Vegas, 1984.

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