Here is a very interesting article about doing chemical analysis of the gum on Dennison hinges. The article is at the very end of the .pdf file linked here, which is the May 2004 issue of the Winnipeg Philatelic Society‘s newsletter, The Buffalo.
Here is a very interesting article about doing chemical analysis of the gum on Dennison hinges. The article is at the very end of the .pdf file linked here, which is the May 2004 issue of the Winnipeg Philatelic Society‘s newsletter, The Buffalo.
