American Philatelic Society
@aps-stamps.bsky.social
Our mission is to promote stamp collecting for people of all ages!
On this day in 2017 the U.S. experienced a total solar eclipse that stretched from coast to coast. To commemorate the event the USPS produced its first stamp using thermochromic (heat sensitive) ink. Read more about the science of the printing process in Issue 1 of StampEd Magazine!
stamped.pub
stamped.pub
August 21, 2025 at 3:59 PM
On this day in 2017 the U.S. experienced a total solar eclipse that stretched from coast to coast. To commemorate the event the USPS produced its first stamp using thermochromic (heat sensitive) ink. Read more about the science of the printing process in Issue 1 of StampEd Magazine!
stamped.pub
stamped.pub