I am using the laser printer method and have been trying to work out a way to get the toner to transfer reliably to the board. Nothing seems to give consistent results.
I've tried heat transfer at 170 and 200 C for 10 minutes each and chemical transfer using acetone/isopropanol mixtures of 3:8, 1:2, 2:3. With heat transfer I apply manual pressure for the first minute or so and with chemical transfer I clamp the board into a wood / paper towel sandwich and let it sit for about an hour.
I am using sandpaper on the copper to get the toner to stick.
The issue I am having with heat is that often only part of the image will transfer. The issue with acetone is that the traces have holes in them.
Anyone have any good tips?