Succeeding homemade photoetch #3

-Then you must buy some *special recto verso photoresistant brass*. I have learn this thing: don't even try to spray the stuff by yourself recto and verso, because there will be some drippings everywhere, and the slightest dust grain will destroy everything. So that's a bit more expensive solution, but at least it WORKS. the brass I found was 25cm x12,5 which was more than enough for my needs. The brass comes with some opaque glueing paper on it that you have to remove before use. I bought the stuff here