In the art world, it is fostered by an incessant rain of numbers in the media whenever an art star comes to its attention. Graffiti Artists Turn on Banksy: The Rise of Art Hate Anthony Haden-Guest August 6, 2014
For the music genre, see Sludge metal. Sludge. Sludge is a semi-solid slurry and can be produced as sewage sludge from wastewater treatment processes or as a settled suspension obtained from conventional drinking water treatment and numerous other industrial processes.
Answer Wiki. Two basic enemies of an engine, especially one that sits for periods of non-use, are sludge and varnish. Sludge is the final product of oil, which is designed to pick up contaminants in the lubrication system (high-detergent oil) and then deliver it to the filter for disposal.