Harris Tweed any flaws. Once ready the cloth is finished. Dirt, oil and other impurities are removed by washing and beating in soda and soapy water before it is dried, steamed, pressed and cropped. The final process is the examination by the independent Harris Tweed Authority which visits the mills weekly, before application of their Orb Mark trademark which is ironed on to the fabric as a seal of authenticity. In 2012 the weavers and mills of the Harris Tweed industry produced one million metres of Harris Tweed, compared to 450,000 metres in 2009, which was the highest production figures in 17
Aircraft fabric covering often cut from downed aircraft and used as war trophies. The German aircraft designer Hugo Junkers is considered one of the pioneers of metal aircraft; his designs started the move away from fabric covering. The highly flammable mixture of fabric, dope and hydrogen gas was a factor in the demise of the Hindenburg airship. By the World War II era many aircraft designs were using metal monocoque structures due to their higher operating airspeeds, although fabric-covered control surfaces were still used on early mark Spitfires and other types. The Hawker Hurricane had a fabric covered fuselage, and they also had