I have seen in other posts that a 1.8-2.0 negative density range is best for pt/ pd printing. I don't understand exactly what this means. If I were to use a 1.8 density range as the target, would I place zone I on .10 and zone VIII on 1.9? D oes a 1.8 denstiy range refer to the difference between the density of zone VIII and zone I?
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