DIY COLOUR DARKROOM
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INTRODUCTION This guide is for
those
interested in setting up a home colour darkroom! More specifically, for
printing colour film onto colour-negative (RA-4 process) paper. This
guide will not cover developing of colour negatives (C-41 process), and
assumes that you have access to a lab that will process your negatives
for you. Contrary to popular belief, the task is not inordinately difficult. It is in actuality, highly cost effective, especially given the outpouring of old darkroom equipment on the used market for relatively no cost at all. Indeed, putting together a colour darkroom is no more difficult than putting together a black & white darkroom. In addition, a colour darkroom setup is perfectly capable of supporting a black & white workflow! The cost of consumable material such as paper and chemistry is very low (orders of magnitude less expensive than inkjet paper and ink!), and achievable image quality through optical printing is practically unparalleled, especially when cost is considered! |
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CLEARING THE AIR Common misconceptions about colour printing (popular deterrents): “But
it requires extremely precise temperature control (94F/34C)”
“Colour
chemicals are highly toxic compared to black and white chemicals!”
“Colour
chemicals are extremely expensive and impossible to find!”
“Colour
chemicals spoil quickly!”
1) Make small
batches of working solution. Stock solution keeps much better than
working solution. (Don’t mix 10L of working solution at once unless you
plan on hosting an orgy of binge printers. (In which case, I hope I am
invited.)) 2) Keep air out
of bottles. There are several ways to do this, but the simplest is to
squeeze the bottle until the liquid is as close to the lid as possible,
then seal it. Can’t squeeze any more? Switch to a smaller bottle. This
can mean the difference from chemistry lasting two weeks to chemistry
lasting a year!
3) Refrigerate
chemistry. Using the above techniques, I have been able to keep
solutions from spoiling before having a chance to use them completely.
In some cases, this has been up to 2 years!
“Setting up a colour darkroom/printing yourself is too expensive! Why bother?”
"Setting
up a colour darkroom is difficult. The learning curve is too great."
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Omar Elkharadly, 2010
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