United States of America 1900s Massachusetts Collection – Set of 10
$16.99These postcards of the sweeping hills, cliffs, and towns of the United Staes of America were created using the Photochrom process, a complex method of imbuing black-and-white photographs with relatively realistic color. Invented in the 1880s by a Swiss printer, the Photochrom process began with coating a tablet of lithographic limestone with a light-sensitive emulsion…