How do you handle sinks in double tissue foil?
I make the pre crease but that leaves me with some parts valley, some parts mountain, and the foil seems to be impossible to revert a valley into a mountain on the very same crease, it bends,in the best case, in a new crease alongside the pre crease, 0.0001 mm gap, yes, but new crease. And the result is kinda bad. Any suggestion?