I know that the Wet Collodion process was continued in use in the graphic arts field well into the 20th Century...long after it was abandoned as a photographers media for portraits, etc. My question is this: With the use of the wet plate process for re-enactments and vintage portraiture, the collodion is flowed onto the cleaned plate by hand and this can cause some raggedness at the edges, also since the developer is often flowed on by hand, this also can cause edge roughness...some people might think this adds charm to the overall look of the image. But...if the wet plate process was used in the graphic arts I would assume that the coating and development of the materials had to be developed to the point where it was near flawless. Were there machines, devices or tools available to consistently get a full even coat of collodion onto the plate surface? Were there developing techniques to ensure complete and even plate development right out to the edge? Curious minds want to know.