tri color images ..
i know it is possible to make tri color images
from pan film, but is it possible doing this sort of thing
with photo paper as a negative, or hand coated glass plates (liquid light emulsion ) ?
if not, what were people like sergei prokudin-gorskii using
if they weren't using pan film ?
thanks for your help / suggestions !
i realize this steve that is why i am asking ...
it seems that before "pan film" was widely available
that there were people doing tri-color images ..
maybe i am wrong ?
im not sure when exactly panchromatic film became available
but i think it was after 1904-1915 ...
Maxwell achieved color by accident and without really having a panchromatic film.
However, pan films were available before your dates John, IIRC, using chlorophyll as the red sensitizer.
Panchromatic films date from just before Prokudin-Gorskii, 1908 saw their widespread introduction & use.
Originally Posted by jnanian
The British manufacturer Wratten & Wainright were one of the leaders in this field and had one of the best Research teams around, so George Eastman bought them as part of his getting Mees & Sheppard to work for Kodak. Kodak's two major Research facilities Rochester & Harrow were led and partially staffed by former Wratten employees.
Steve, I'm currently doing a bit of research into Reversal processing for someone on APUG but actually by a request elsewhere, a different website .
What's surprising is that B&W reversal processing only becomes commercial with the introduction of Panchromatic films. The reason is quite simple it's used for Tricolour screen processes.
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ron and ian + steve
lots of knowledge here on apug !