I have used Rollei IR 400 shot at box speed with the 720 filter and adjusted with the Zone System for shadow details developed in replenished XTOL. That I have found consistently brought out the shadow detail while retaining the Wood Effect.
Look at my post: R25 [25A] has a factor of 3 [23 = 8 times the exposure time], 720 [72R] has a factor of 5 [25 = 32 times the exposure time]. Mathematics shows that 5 is greater than 3. I have found the filter factor for the 720 listed as 6 but that was a little too high sometimes from my...
Using box speed, taking a light reading and adjusting for the filter factor is more accurate that arbitrarily setting an effective ISO. Filter factors are supplied by the manufacturer, who actually know what they are doing, not like the random number pulled out of the air, guessing, without any...
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