Canadian Stamps and Postal History
The Papers Used To Print The Centennial Definit...
This post examines, on a broad level, the issue of paper fluorescence on the stamps of the 1967-1973 Centennial Issue and the study of fluorescence.
The Papers Used To Print The Centennial Definit...
This post examines, on a broad level, the issue of paper fluorescence on the stamps of the 1967-1973 Centennial Issue and the study of fluorescence.