Using that info, if 0.8 vpd is desired,
at 80F I would want 77% rH, at 70F 68%, and at 60F 55%.
And then for curing we don't want to lose any more moisture I imagine, so target 1.0 vpd:
80F:72% , 70F:60% ,60F:44%
or a little higher % to be on the safe side, < 1 vpd
44% at 60F is a surprise to...