Training in the plaster of paris techniques of model and mold making is fundamental to the capacity building of those ceramists who are intent on mass production. In the developing world those who work with clay, local ceramists, are almost everywhere, producing such simple products as water storage containers, cookpots and construction brick. These ceramists tend to be entirely capable and eager to learn more about new processes and products. Their capacity building in model and mold making will initially contribute totally sustainable environmental health interventions: ceramic water filters and insulating ceramic rocket rockets stoves, by the poor and for the poor. The model and mold techniques learned will make possible development of innumerable ceramic products, at the origin of micro-industry.