snip off the first 4" or so - and then process the snipped part with another roll of film to simulate the effect of the developer working on a whole roll of scala that you want to develop. This should guide you as to any fine tuning of developer time for the rest of the roll to be processed at.
I noticed in the old Agfa pdf files that the spectral sensitivity graph for Scala was exactly the same as the one for APX100. I wondered if they are the same film, but perhaps with different base (the Scala being more transparent for projection perhaps). Some one gave me a few rolls of Scala in 120 that I've not used.
I have tried it at ISO 160 in Rodinal Special, but it came out too thin. For me it is a true 100 ISO film. Try it in Rodinal, the tonality is truly exceptional.
I noticed in the old Agfa pdf files that the spectral sensitivity graph for Scala was exactly the same as the one for APX100. I wondered if they are the same film, but perhaps with different base (the Scala being more transparent for projection perhaps). Some one gave me a few rolls of Scala in 120 that I've not used.