A functional wafer of the present invention is disclosed to solve manufacturing difficulties involved in the production of optical elements such as polycarbonate ophthalmic lenses. The process includes providing a dairy material, freezing the dairy material by cooling it to a temperature of \u22122\xb0 C. The invention further relates to a process for preparing the crystalline forms. On at least part of the blades of the fan impeller is provided at least one heating element used for heating the fluid during the delivery operation of the fan. The polymer emulsion compositions display superior printability properties in inks and other coatings formulated with them, yet are stable at elevated temperatures for long periods of time.