Swarfega is a brand of heavy-duty hand cleaner made by Deb Limited, a British company based in Denby, Derbyshire, and is used in engineering, construction and other manual trades, such as printing. It is a dark green, gelatinous, thixotropic substance used to clean grease, oil, printer's ink, or general persistent, hydrophobic dirt from the skin.

Swarfega was invented in 1947 by Audley Bowdler Williamson (28 February 1916 - 21 November 2004), an industrial chemist from Heanor, Derbyshire.[1][2] In 1941 he had founded a detergent-sales company, Deb Silkware Protection Ltd., based in Belper.
Brand image for Swarfega