Bobert - I don't understand the whole process of collotype/pochoir but it is an early photographic process (collotype) where the film produced was then cut into a stencil. Pochoir is a stenciling process where colors are hand applied to the print (somehow). My three Klee's each have an embossed seal in the lower right corner that says "PROCEED JACOMET". (Jacomet process) Daniel Jacomet opened an atalier in Paris in the early 1900's and used this process for mostly upscale limited edition art books. If you look at a collotype under a magnifying glass you won't see any benday dots that are the color dots that make up color pictures in printing. I think the process died out in the mid 1900's as too labor intensive. Put "collotype & pochoir" into GOOGLE or Yahoo and you'll get some hits. If you want to discuss further: meaderf1@westat.com (that's a "one" after the "f")