westfw mentioned an aluminum cookie sheet. How about any rectangular sheet of metal?
In any case, how should an antistatic mat be grounded? At http://www.esda.org/esd_fundamentals.html
, the Electrostatic Discharge Association (ESDA) recommends connecting the mat to what they refer to as an equipment ground or the third wire (green) electrical ground connection, such as the center screw of a standard electrical outlet, via a grounding cord with a ring terminal. Can a 18-22 gauge wire be used as a cheap grounding cord? Should there be a resistor (1 MOhm) connected between the mat and the grounding cord? And if an outlet has more than one screw, such as an outlet with four or six sockets may have, can any of the screws serve as the grounding point?