Introducing a "NEW" Gold Pen Plating solution. This new pen solution improves the equality and stabilization of the plating deposit.This doesn't contain free cyanide so it is not hazardous to ship. It comes in 4 different colors to help you customize your jewelry. This gold Solution specifically formulated for the pen platers. It is a 18 karat yellow gold color. This plates at a voltage of 4.5-6.5 Volts.