On the otherhand, if it exceeds 300,000, the flow properties of the toner are substantially impaired and hence the toner is not favorable for use in high speed copying apparatuses and copying apparatuses operated at a low quantity of heat.Specific examples of the foregoing ethylenically unsaturated monomers copolymerizable with styrene include acrylates such as methyl acrylate, ethyl acrylate, pro