tri color images ..

[removed account4]

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 !
john

 

[Sirius Glass]

Print paper sees blue, or green, or blue and green [variable grade paper]. Print paper does not see red.

Steve

 

[removed account4]

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 ?

http://www.cs.cmu.edu/~dellaert/aligned/

im not sure when exactly panchromatic film became available
but i think it was after 1904-1915 ...

 

[Photo Engineer]

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.

PE

 

[Ian Grant]

im not sure when exactly panchromatic film became available
but i think it was after 1904-1915 ...

Panchromatic films date from just before Prokudin-Gorskii, 1908 saw their widespread introduction & use.

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.

Ian

 

[Sirius Glass]

Let us not start flame wars about "that tri-color thingie", if you get my drift [Insert wink here]. Magenta is a color and for completeness so is maroon.

Steve

 

[Ian Grant]

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.

Ian

 

[removed account4]

ron and ian + steve

lots of knowledge here on apug !

thanks !

john