Martina Neumayer@Gargron @ZuilenV Both processes are standardized and well commonly used since many years. Besides you can fairly use C41 one to bath bw negatives as well as the papers later too. There will be no differences and is absolutely no need to pay some extra fees for bw processing. Someone at this lab told you an complete bullshit, or doesn't know how those things works. Or both.
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