THE PHOTOCHROM GUIDE TO : The seaside resort of Blankenberghe in Belgium. c. 1890.
Invented 140 years ago in 1880s Zurich, Photochrom, a.k.a. Fotochrom, Photochrome or Aäc process, is an old school process for colourizing black-and-white negatives via the direct photographic transfer of a negative onto lithographic printing plates. The process is a photographic variant of chromolithography (color lithography).
Creatively choosing colour & then using a mechanical process to apply that colour to a black & white photo rather than doing it by hand.
Colouring-in a monotone world.
The printer is the Detroit Publishing Co. of Michigan, Foriegn Section.