Killer PCBs

Step 4 Prepare Copper-Clad

Carefully clean the copper-clad material with a scrubbing pad and a bleach-containing scouring compound (e.g. Soft Scrub w/Bleach). Sand with 320 or 400 grit wet/dry sandpaper to roughen the surface and ensure proper resist adhesion. Dry the board being careful not to touch the board without gloves (to prevent transferring skin oils to the board).