Collotypes usually have a light tan or black and white tone and a matte surface. Under the microscope they have a distinct reticulated pattern, appearing like a mosaic with similar size pieces of irregular shapes. It often resembles a bunch of noodles.

What is a Collotype reproduction?

Collotype, also called Photocollography, photomechanical printing process that gives accurate reproduction because no halftone screen is employed to break the images into dots. ... The hardened areas accept the ink, and the plate can be used to print a few thousand copies of the positive image.

What is a Collotype postcard?

Collotype postcards were printed from a gelatin surface that hardened into a network of fine cracks producing the characteristic random arrangement seen under magnification. Many collotypes were hand-colored in soothing pastels or otherworldly fluorescents.