Existing comment:
Stamp Production:
Changes in technologies and available materials have affected the look of stamps -- and will continue to do so.
Today engraving is still used to produce some stamps, but sparingly because of its high cost. Other methods include photogravure, which "engraves" the metal plate using chemicals and light rather than tools. Offset lithography uses flexible rubber or aluminum plates, which are not engraved at all. These processes are easier and less expensive than engraving, and they produce more colorful images. The look of stamps will continue to evolve with technology.
Proposed user comment: