Photochromes are vibrant and nuanced prints hand-coloured from black-and-white negatives.
Created using a process pioneered in the 1880s, these images offer a fascinating insight into the world when colour photography was still in its infancy.
Street food in the Strada del Porto in Naples, Italy. 1899.
The finished photochromes were produced using at least six different tint stones, although many more were often used.
Women in Algeria. 1899
Photochrome is a method of producing coloured images from black-and-white negatives, allowing colour pictures to be created before colour photography became available.