Calotype
An early paper-negative process, patented by Fox Talbot in 1841, allowing multiple prints from one exposure.
In depth
The calotype introduced the negative-positive principle that governed photography for the next 160 years. Its images are softer than daguerreotypes because light must pass through the paper fibres of the negative, which gives calotype prints their characteristic broad, textural quality — a look the process's admirers valued in its own right.
Examples in practice
A calotype landscape shows soft, granular detail and could be printed a dozen times, unlike a unique daguerreotype.