Link to Adminware web site article on the variety discovery:
http://www.adminware.ca/headlines/n...ts.php?id=93Parts of the article copied here:
Quote:
Dudley Nash discovered a major new variety on the 50¢ Red Calla Lily flower coil stamp (Scott 2072) in January, some seven years after the stamp was released.
The variety is a fluorescent ink that glows a “turquoise green” colour, and is only visible under a short wave ultraviolet light [1]. Most Canadian collectors use long wave UV light to check for tagging varieties.
~~~
[1] when viewing stamps with short wave UV be aware that this wavelength cannot “pass through” clear plastics or clear stamp mounts.
Posted 04/15/2011 03:32 am
