I am having problems with the ink not staying on the board.
I heat the durabrite ink on the blank board until it turns purple,
then give a hot bath in etchant, but after 15 minutes or so
and see the ink traces lifting off, what gives?
So far have tryed ammonium persulfate, hci+peroxide,
and now settled on just using sodium persulfate. (supposed to be ink safe)