Response to How Calibrate Film Processing?

Update. I tried the above and was not able to adequately discern the variations in negative densities. In my further readings I came across The New Zone System by White. Well, written in the 1970's its not new but I did find this reference quite useful. I don't think it is in print anymore but was able to get a copy from the library. Without getting into too much detail, the method involves making test negatives followed by printing of the negatives. The results are compared to standard gray cards. I have been able to identify my corrected EI and normal development for TMY in xtol. This book also discusses some interesting zone system manipulations that I had not read about before. The most interesting is a method for expansion and compaction (as White calls it) that pivots around zone V rather than simply expanding or contracting from zone 0. At any rate, for those of us who want to use the zone system and a densitometer is not available I recommend this book.

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