Originally posted by Jonathan Mac 1. Development is supposed to be done at 20ºC. I live in Madrid, where the summer days will hit 40º (or more) and the nights will drop to 32º. So, maintaining things at 20º will be difficult in the very near future. Will I be able to accurately calculate the development times for temperatures that are several degrees above what's recommended?
My answer to this is to temper a bucket of water to 20ºC before starting developing. Use it to mix up your developer then for water rinses. I keep a 2L jug in the fridge to be able to lower the temp. Having a largish amount means it will take longer to be effected by the ambient temp. I measure the developer temp before pouring it in, then near the end of the development time (I admit I do this a bit 'seat of the pants') usually 2mins from the end of the time. This lets me check the developer hasn't got hotter, and if it has, to stop development a littler earlier. If it's gone up less than 1ºC then I'll probably do nothing, but any higher and I'll stop development earlier. As mentioned above, if you have wild temps use a water bath to sit the tank in in between agitations. If you need to develop at different temps, Ilford have a chart to work out the required times at different temps.
Quote: 2. I've read that developing chemicals go off quickly, but I haven't been able to determine how quickly. Should I worry about this? Is powdered developer better? My current plan is to use Ilford ID-11 and I won't be doing a huge amount of developing. Will the high summer temperatures of where I live make the chemicals even more short-lived?
Once mixed, powdered developers will start to deterioate, however unmixed they tend to have good shelf life. Handy if you don't have a local supplier and need to order several at once. Some liquid developers have good shelf life, others terrible. The recommendation for Rodinal equivalents is probably a good one if they have similar qualities to Rodinal, which keeps for ages. A common recommendation for when mixing up a powder into 'stock' is to store it in little bottles topped right up (little or no air).
Quote: 4. One link I found recommends a water pre-soak for a minute before developing, but I haven't seen it mentioned elsewhere. Opinions?
Ilford specifically recommend not using a pre soak with their films. Read up on the theory.