ChrisR
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Visiting my sister over the past week, we found a wooden box full of my father's prints, 6*9 black and white negatives, and packs of 6*9 Dufaycolor transparencies. I assumed that "Dufaycolor" was simply the name for a processing shop (it was on the envelopes, not the transparencies), but there was a letter to my father that referred to the good results with his Dufaycolors. That letter was dated 1948, I think.
So today I did a search for it, see for example http://www.photomemorabilia.co.uk/Ilford/Dufaycolor.html :
Very interesting! It appears to be a bit like a precursor to modern digical Bayer arrays!
Does anyone know if this film structure will make scanning difficult? I'm looking to buy a MF scanner so I can share some of these with the rest of the family....
So today I did a search for it, see for example http://www.photomemorabilia.co.uk/Ilford/Dufaycolor.html :
"Dufaycolor film had a speed rating of around 10ASA, a third of a conventional b&w film of the day. (Ref: Brian Coe, "Colour Photography, The first hundred years 1840-1940", page 72).
Dufaycolor film consisted of a transparent, non-inflammable base on which was printed a very fine transparent colour pattern consisting of alternating blue and green squares and red lines. This pattern was called the 'réseau' and the complete pattern of 3 colours was reproduced 20 to 23 times per mm. On top of the réseau was a coating of high sensitivity panchromatic emulsion.
The film was exposed through the base so that light passed through the colour réseau before reaching the emulsion. In this way the image was broken up into minute areas representing the red, green and blue components of the subject."
Very interesting! It appears to be a bit like a precursor to modern digical Bayer arrays!
Does anyone know if this film structure will make scanning difficult? I'm looking to buy a MF scanner so I can share some of these with the rest of the family....