[Tig] Potato prints
richard at filmlight.ltd.uk
Fri Aug 21 09:04:00 BST 2009
Rob Lingelbach (rob at colorist.org) wrote:
> I hadn't had the time to look at that link until recently. The color
> is really amazing.
Before everyone rushes out to look at Autochrome originals, I had better
warn you that they may not look as good as they appear on the web. The
image is made from dots of orange-red, green, and blue-violet, so the
best white you can get will be a muddy brown-grey, about the tone of an
18% grey card. You can adapt to the white point - I am always amazed by
the 'white' you can get in the 'Financial Times' images, which is
printed on pink paper - but this is too dark for us to adapt to, even
with a dark surround.
Remember 'Polacolor' slides? This was the same technology - you had red,
green, and blue stripes and a black & white emulsion that developed. The
stripes were used to filter the incoming light, and to produce the
colours on the developed image. The horizontal resolution was not great,
and they looked pretty dim in a presentation with ordinary slides.
The solution with some autochromes was to go for 'high-gain' images.
They made autochrome prints on silver foil, or glass mirrors. These can
give you wonderful, bright, saturated images, but only if you can view
the image when it is reflecting a broad, white source. It is a bit like
viewing a colour hologram - you have to do a lot of wiggling you head
and moving the thing before you can seen the colors properly.
Heres an even funkier color process...
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Artists House, Fax: +44 (0)20 7292 0401
14-15 Manette Street
London W1D 4AP
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