| has gloss | eng: Filtered beer has been deliberately cleaned of significant contact with yeast through filtration. The process of filtering removes carbonation and renders the beer technically unstable so it needs force carbonation to keep it "alive". Mechanical filtering and even pasteurisation of bottled beer started at the end of the 19th century, though the first beer known to have been mechanically filtered and force carbonated for the keg to be served as a draught keg beer was Watneys Red Barrel in 1931. |