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Trade test colour films were broadcast by the television network BBC2 in the early days of colour television in Britain during intervals when no regular programming had been scheduled. The goal of these transmissions was to provide colour broadcasting in these intervals for use by television shops and engineers (the 'trade') to adjust their television sets. The earliest such transmission was made in 1956 (on the then sole BBC channel) but regular all day long films ran from autumn 1967; the last one was in August 1973. In all, 158 different films were broadcast; on average, each film was shown 90 times. The frequent broadcasting of the films made them well known to viewers of the time. The one most frequently shown was ''The Captive River'' (1960), which was shown 525 times. The short film ''Giuseppina'' (1959), which had won an Academy Award, was shown 158 times and became the last trade test colour transmission on August 24, 1973. Other frequently broadcast films included ''The Home Made Car'' (1963), ''The North Sea Quest'' (BP, 1967), ''Overhaul'' (1957), ''Crown of Glass'' (1967), ''Roads to Roam'' (1967), ''The Small Propeller'' (BP, 1967), ''The Cattle Carters'' (BP, 1962) - with a theme song sung by Frank Ifield, ''Prospect for Plastics'' (1962), ''Evoluon'' (1968) and ''Cantagallo''.〔(【引用サイトリンク】url=http://www.testcardcircle.org.uk/ttcfatoz.html )〕 A number of these films were produced by the oil company BP, including ''We've Come a Long Way'' (1951), ''The Shadow of Progress'', ''Newspaper Run'', and ''Skyhook''. Other films included ''Paint'' (produced by Shell), ''Study in Steel'' (produced by British Steel), ''Algerian Pipeline'' (Constructors John Brown Ltd), ''The Captive River'' (Shell), ''Ride the White Horses'' (Ford Film Unit), ''Something Nice To Eat'' (the Gas Council), ''It's The Tube That Makes The Colour'' (Mullard), ''On the Safe Side'' (1967, UKAEA), ''Oil Underground'' (1960, Shell) and ''Transport Ability'' (UKAEA). Another film, ''Birth of a Rainbow'' (1967), about trout farms, was made by the New Zealand National Film Unit, while ''Network'' (1962) was made by the AEI, and ''No Claim Bonus'' (1963) was made by the COI. ''The Gold Miners'' was made by Films of Africa, and ''A Journey into the Weald of Kent'' (1959) and ''Beauty in Trust'' were made by the National Benzole Company with narrations by Sir John Betjeman. The trade test colour films are among the subjects of interest of the ''Test Card Circle'', an organization devoted to studying and preserving the test cards used by television broadcasters. The static test cards are typically transmitted for periods before and after regular programming, originally to permit viewers to adjust their television sets. ==BBC2 daily schedule == According to the BBC Written Archive Centre, the following is an example of a typical day on BBC 2 in the late 1960s when the only scheduled programme during the day was ''Play School'' at 11 am: :09.00 Colour Testcard F :10.00 Service Information For The Television Trade :10.03 Colour Testcard F :10.30 The Colour Receiver Installation Film :10.43 TRADE TEST COLOUR FILM followed by Colour Testcard F :11.00 ''Play School'' followed by Colour Testcard F :11.30 Service Information For The Television Trade :11.33 TRADE TEST COLOUR FILM followed by Colour Testcard F :12.10 The Colour Receiver Installation Film :12.23 Colour Testcard F :2.30 Service Information For The Television Trade :2.33 TRADE TEST COLOUR FILM followed by Colour Testcard F :3.10 The Colour Receiver Installation Film :3.23 Colour Testcard F :3.30 TRADE TEST COLOUR FILM followed by Colour Testcard F :4.30 TRADE TEST COLOUR FILM followed by Colour Testcard F :5.30 TRADE TEST COLOUR FILM followed by Colour Testcard F :6.30 TRADE TEST COLOUR FILM followed by Colour Testcard F 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「trade test colour films」の詳細全文を読む スポンサード リンク
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