🛠️ Invention or technique

Adhesive postage stamp and uniform penny post

Sello postal adhesivo y franqueo uniforme (Penny Black)

Date
1840 · confidence high
Place
London, England, United Kingdom
Credited to
Rowland Hill (reform); James Chalmers (adhesive stamp, disputed)
People
👤 James Chalmers1782–1853👤 Rowland Hill1795–1879
Field
Communication

⚠️ Disputed: the sources disagree.

What it is

A postal reform charging a flat rate of one penny, prepaid by the sender using an adhesive stamp, instead of charging the recipient according to distance. The post became a universal mass service.

James Chalmers of Dundee claimed to have proposed the adhesive stamp in 1834; Lovrenc Košir suggested it in Austria in 1835. Hill was the author of the reform as a whole.

What it led to

  • An explosion in private and commercial correspondence (from 76 to 350 million letters in a year)
  • The Universal Postal Union (1874)
  • Prepaid envelopes, letter boxes and mail order
  • Philately

Built on

  • Public railway (mail transport)
  • Perkins Bacon security printing
  • Dockwra's postal rates (1680)

Made possible

  • Machine-made envelope (De La Rue, 1845)
  • Postcard (1869)
  • Postal money order

Links

Sources✓ verified 2026-09-25