During this same year White and Stieglitz undertook an artistic experiment in which they jointly created a series of photographs of two models, Mabel Cramer and another known only as Miss Thompson. Stieglitz offered suggestions about posing the models, White focused the camera, and one or the other of them would snap the shutter. White also developed the negatives and printed the photographs. One of the intentions of the experiment was to try a variety of printing techniques and papers, including platinum, gelatin silver and gum bichromate prints. On a few signed of the prints they signed with a monogram that combined both of their initials. During this collaboration, White learned the Autochrome color process from Stieglitz, who had just returned from Europe with this technical knowledge. White and Stieglitz jointly created at least one Autochrome during this time, which they exhibited later in the year.