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This topic comprises 2 pages: 1 2
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Topic: ? about slide film developing at home
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Stephen Furley
Film God

Posts: 3059
From: Coulsdon, Croydon, England
Registered: May 2002
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posted 07-24-2003 02:07 AM
processing your own is probably not a good idea if tou only want to do the odd roll occasionally. A typical plastic tank needs about 300ml of solution to cover a 35mm film, so this is the minimum quantity you could make up. There are slight variations between different kits, but this is probably going to be able to process three or four 36 exposure films. Once made up, the developers have a life of about two to three weeks, the other solutions rather longer, so to get the maximum use from the chemicals you either need to be shooting about two films per week, or wait until you have a batch of films ready before making up the solutions. The concentrates in the kit will keep for about a year, so you need to use the whole kit in this time.
I usully buy a 5 litre kit, I make it up in one litre batches, each of which will process 12-14 films, therefore I can get 60-70 films from one kit. I process film for myself, and for one other person, and this is just about the amount we get through in a year. The cost of the kit is just over fifty pounds, so that works out at something under a pound per roll, unmounted.
Buying smaller kits is more expensive, and discarding chemicals before they are fully used even more so.
To keep John happy, I will also point out that using chemicals to less than their capacity is not good from an environmental point of view.
If you do decide to do it, I would recommend either the Kodak or Tetanal, distributed in the USA by Jobo I think, chemicals. Both will give excellent results, I use the Tetanal six bath version for reasons of kit sizes and availability in my area.
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Stephen Furley
Film God

Posts: 3059
From: Coulsdon, Croydon, England
Registered: May 2002
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posted 07-24-2003 06:01 AM
I would say that you need to process about about three runs within two to three weeks, once you have mixed the solutions, the larger the volume you make up the more films you can process, both in each run, and in total. If you make up 300ml, which is about the minimum for a plastic tank, you're talking about needing to do an average of about one film per week during the 2-3 week life of the chemicals. Of course, you can save up your films, and only mix the chemicals when you have enough to make it worthwhile, but then you lose the advantage of seeing your pictures quickly.
If you are doing less than this then it probably isn't worth doing it yourself unless there are special circumstances, e.g. you need the pictures in a hurry, and there isn't a lab nearby.
Over the year, I process the equivilent of slightly more than one film per week, but these tend to be in batches of about 10-14 over a couple of days every few weeks. About one third of these are my own, the rest for the other person.
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