Calotype of Charlotte Lockhart, grand-daughter of writer Sir Walter Scott (1846)

The calotype was the first paper negative photography method. Though far outclassed in definition and popularity by its French counterpart, the expensive and manually-developed daguerreotype did not make a good transition into the age of mechanical reproduction and has become now an artifact of the history of photography. The widely used film technology that reigned for a century and is now in its sunset (thanks to the introduction of digital) was based on the calotype of Henry Talbot.