Homebrew PCBs

I tried using a J-roller to apply photoresist yesterday and it worked quite well. No problems with air bubbles getting trapped under the resist. You want to hold the resist against the roller as you push the roller forward rather than laying the resist down and trying to push the air bubbles out.

If you are not familiar with a J-roller, it is normally used to apply laminate to kitchen counter tops. I found mine at Home Depot in the kitchen refinish area, but I am sure most hardware stores would carry it.