This process consists in removing of small quantities of solids that cause cloudiness when the oil is kept at ambient or low temperature. These solid substances can be saturated glycerides or waxes. The dewaxing or winterization process involves the cooling of oil to crystallize high melting compounds followed by filtration or centrifugation to separate crystallized mass from oils. Bleached or deodorized oil is first cooled through a series of heat exchangers and then fed to the crystallizers. Crystallizers are equipped with double-layered coils circulated with chilled water. Once crystals form, the oil is filtered through filters and sent for further processing.