For film photography I like to use my own home brew of Xtol and Rodinal developers mixed together to develop my black and white film negatives. I have used various ratios of each but all giving acceptable and pleasing results.
Question: Are Xtol stock and diluted Rodinal one shot developers?
After speaking to a camera shop I was advised that it is recommended to dump your developer after each roll of film developed…
Answer: (Based on my own experience). I am self taught so learn as I go. My first disappointment was using a batch of developer that was a week old (since dilution from Xtol stock/ Rodinal concentrate) and the film negatives came out almost blank. The developer had been kept in a clear soft drink bottle in a dark cupboard. My first valuable lesson was diluted developer does not last as long as diluted fixer solution. I now aim to use a developer batch within 2-3 days of dilution and then dispose of it.
However, unlike the guy in the shop, I do not use the developer as one shot. I mix 1L of developer brew and develop as many as 6 rolls of film (mostly 120 medium format film but also the occasional 36exp 135 film) during a 2-3 day period.
Conclusion: Obviously the active ingredients in the developer becomes more exhausted after each roll of film developed so developing times will need to be increased accordingly. Even if you only develop 2-3 rolls of film per batch of developer you have still made a 100% or 200% saving on developer costs.
More film myth breakers coming soon..