Evenin' all,
In the BTZS procedure Mr Davis calls for development times for the film of 4, 5.6, 8, 11 and 16 mins.
Can I use times around my previously determined 'normal' instead ?
I determined that Pyrocat-HD at 1.5:1.5:100 and 20 C, FP4 @ ISO 64 and 4.5ml per sq inch for 12mins15secs with slow constant agitation (4-6 rpm on the tank) produced a CI of around 0.47. I would like to use this 12min15secs as the mid-point of the BTZS tests.
That is 6:07mins, 8:40mins, 12:15mins, 17:20mins and finally, 24:30mins
Can I do that or do I need to use Phil Davis times? Perhaps it doesn't matter a whit coz the software would sort it all out ...
Hmmmm...
If I were to use other chemistries would I go ahead and find a CI of 0.47 for each film and developer combination prior to doing BTZS testing for that combo ? I'm going to give the EcoPro XTOL replacement a try and also some Rodinal at 1:50 both with FP4 at this stage.
Cheers,
Steve
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