Ink dating accuracy
This gives these images a very matte look not normally associated with photography, and making some easy to confuse with collotypes.This too is not foolproof for many publishers had large stocks of photo papers using them for decades after they stopped being manufactured.NOTE: There were many other photo papers manufactured in addition to those listed on this page, and even these could be made in different finishes from matte to glossy.At least 450 different real photo postcard backs can be found but as of this time there is a lack of accurate information regarding all their dates of use, or they were used in very limited quantities.
Kodak controlled 80% of the paper market with their brands Artura, Azo, Aristo, EKC. Cyko by Ansco, Argo by Defender, and Kruxo by Kilborn comprised most of the remaining market.
lthough real photo postcards were made in a variety of ways, they hold one identifiable feature in common.