An effective amount, for example from about 0.3 to about 3 weight percent, and preferably from about 0.5 to about 2.5 weight percent of alkali metal carbonate or alkali bicarbonate such as sodium bicarbonate powder is added to, or present in the toner, which toner possesses an average particle size by volume diameter of from about 10 to about 20 microns, and preferably 11 microns, and the mixture