Printed Circuit Boards

1.One light-sensitive copper coated (on one side) printed circuit board about 3.5 inches long and 2.5 inches wide.2.No. 2 photoflood lamp.3.Chemicals: Trichloroethylene, ferric chloride, and acetone (most finger nail paint removers contain acetone).4.Drill bit: size number 68 to 64 (diameter 0.031 to 0.036 inch).5.A mechanical stirrer is helpful but not necessary.6.A dark well-ventilated area during part of the process.7.The list of materials needed for the circuit to be mounted on the printed circuit board can be found at the beginning of the next experiment.