Winterization process is the cold filtration of crude extract to remove fat and wax. Fat and wax will produce peculiar smell and increase viscosity. Typically, the product will be dissolved in ethanol and then frozen several times, each time using a gradually decreasing pore size filter. Filtration can also remove the residual plant material in the extraction step via designed by Crown Machinery Co Ltd.’s CANNABINOID CENTRIFUGE, check the details from the link below or sent web mail.