A novel free ion generator capable of producing high concentrations of light ions with high efficiency has been developed. The generator is capable of producing positive, negative or an equal mixture of positive and negative ions. During the course of development of a generator for making homogenous aerosols from methylene blue by the evaporation of alcohol or water solutions of the dye, it was found that the generated particles were highly charged under certain conditions. It was eventually found that the only practical method for neutralizing these particle charges was by mixing the particles with a high concentration of mixed positive and negative small ions. The report describes the ion generator used to neutralize these particle charges. (Author Modified Abstract)