NIVO
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NIVO, abbreviated from Night Invisible Varnish Orfordness (or "Night Varnish Orfordness"),[1] was a dark grey-green overall finish applied to British night bomber aircraft in the inter-war period (1918–1939).
Developed in 1918 by the experimental station at Orford Ness, as a low-visibility colouring for the Royal Air Force it had a sheen to match that of open water on a moonlit night.[2]
It was applied to aircraft from 1918 and was used on the Vickers Virginia, Handley Page Hyderabad, Handley Page Hinaidi, Handley Page Heyfords and Fairey Hendon bombers.
By the mid-1930s, tests had determined that the varnish was too reflective when searchlights were shone on it.[2] NIVO was phased out in the late 1930s, and had been discontinued by the time of the arrival of the new British medium bombers – the Vickers Wellington, Handley Page Hampden and Armstrong Whitworth Whitley.
NIVO is covered by Federal Standard 595 colour FS:34096[3][4]
References
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