Microcrystalline waxes are a type of wax produced by de-oiling petrolatum, as part of the petroleum refining process. Microcrystalline waxes are derived from the refining of the heavy distillates from lubricant oil production. This by product then must be de-oiled at a wax refinery. Depending on the end use and desired specification, the product then may have its odor removed and color removed.