I guess wrong often. It doesn't come up when photographing ... I never previsualize in the talked about sense ... but even when printing I'm sometimes surprised by what will work better in ink or in silver. It would seem easy: you want deep blacks? Silver. You want a long, delicate scale? Ink. But the results defy my expectations all the time.
My experience is still limited to older versions of piezography on matte papers.
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