As you may have noticed there was a solar eclipse visible in America this week.
Needless to say it was an opportunity for the US Postal Service to issue special stamps for the occasion, and they were not the only ones.
Using modern printing technology some of the stamps, including the American ones, used heat-reactive thermochromic ink. That meant that the moon looks black on the stamp but when you put your finger on it the ink is warmed and the moon appears. When the stamp cools it goes back to black.
We do like them, but one question remains for collectors – how do you keep them in your collection without the effect being diminished?
Fear not, young collector, as the American stamp mag, Linn’s, did a series of experiments to find out the best way to store the stamps without damaging them.
They put some stamps under a fluorescent desk lamp; others were kept in the dark and a third lot, for some mysterious reason, were put on a card and left on the dashboard of the editor’s car for a day.
Exactly what that last one was meant to prove was not clear.
The outcome? Well, the best way to keep the stamps was on an acid-free page kept in the dark.
So that would be an album then. Who would have thought it. . . .