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Contact SupplierCrude wax, also called petroleum wax or slack wax, is an unrefined mixture of high-melting hydrocarbons, mainly of the normal straight-chain type, still containing a fairly high percentage of oil. It is obtained by filtration (as such or after addition of a solvent) from high boiling distillates or residual oils. It is obtained by filtration (as such or after addition of a solvent) from high boiling distillates or residual oils Slack wax is primarily obtained as by-product in the manufacture of lubricating oil. The crude wax made from distillate oils is used for the manufacture of slack wax. Good colors stability & Good colors stability.