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of P. and O. House, 14-16 Cockspur Street, London, SW1. Telephone: Whitehall 6747. Cables: "Dufaycolour, London"
1936 Company founded for purpose of developing commercially the Dufaycolor and Cinecolor processes and amalgamating the various companies involved in the processes:
The Dufaycolor process had been developed by Dufaycolor Ltd and Spicer-Dufay with help from Ilford; it was protected by 312 patents. A new factory would shortly be opened in Elstree to make the colour reseau which had been supplied by Spicer-Dufay from its Sawston works up to that point. The film could be used in any camera (it was claimed) and would produce colour transparencies from which black and white pictures could be produced; a process for colour printing was under development. It would be supplied to both amateur and professional users. The company was negotiating with Ilford to emulsion, cut and pack the film.
The Cinecolor process was suitable for professional cinematographers only; it had been developed in Canada by Chromex Ltd in collaboration with Adam Hilger Ltd. The process was not yet working on a commercial basis.
1937 Patent - Improvements in or relating to colour photography. 
1937 Ilford stopped marketing Dufaycolor; the responsibility reverted to Dufay-Chromex of Elstree, Hertfordshire.
1941 Patent - Improvements in or relating to protective spectacles. 
1947 British Industries Fair Advert for exhibits in Plastics Section and Photographic Section. Manufacturers of Sensitised Photographic Materials, Cameras, Optical Lanterns, Photographic Accessories, Photographic Filters, Colour Vision Products, Cellulose Acetate Film, Cellulose Plastics, "Dufaylite" Constructional Material, Electric Torches, Darts, etc. (Scientific and Optical Section - Earls Court, 1st Floor, Stand No. 778 and Olympia, Ground Floor, Stand No. D.1684) 
By 1959 was known as Dufay Ltd (see advert)
1960 Dufay moved Trix production to Birmingham.
1961 Dufay Ltd, photographic film and equipment makers, would need a drastic reorganisation of capital after heavy losses and write-down of stock; 2 acquisitions were under consideration; no dividend had been paid since 1946 on the ordinary shares
1961 A subsidiary, Spicer-Dufay (British), had been renamed Trix Products; the managing director of Trix of Germany was appointed to its board
c.1961 Poor sales lead to Dufay ending Trix production in order to save damaging the rest of the group; Trix was prepared for sale.
1962 Dufay would become an industrial holding company; Trix and Dufay would be disposed of; the Coronet camera subsidiary had recovered from the previous year's set-back; Polyfoto (England) was being reorganised
1962 Trix was sold to Alvus Investments and Trading who planned to restart production in High Wycombe, but only the coach moulding tools were made.
1962 Acquired by Metropole Industries, headed by J. G. Gommes; drastic capital reorganisation was required; Polyfoto was being sold which would leave the company with assets to be used with the new businesses which would be put into the company
Between 1963-5 Dufay acquired Unusual Electric Time and Telephone Systems Ltd.
1964 Acquired a Durham-based manufacturer of industrial and marine paints; the group consisted of G. A. Willis (Middlesbrough) of Aycliffe, Harrison S. Walton and Son of Bidford-on-Avon, and A. E. Onions, also of Bidford.
1964 Entered bidding for Wailes Group by offering a reverse take-over, whereby Dufay would inject its 4 paint companies into Wailes Dove - namely G. A. Willis (Middlesbrough), Harrison S. Walton and Son, A. E. Onions,and Frank Bookless and Co
1965 G. A. Willis introduced a PVC coating material, Dufaycote, which could be applied as a paint, based on a coating for steel developed in 1958 for use by Dorman, Long and Co in a purpose-designed coating plant; the raw material was supplied by British Geon
1965 Agreed merger with Wailes Dove and Co to form a new company Dufay Bitumastic which would be mostly owned by Dufay shareholders; most of the income of the new company would come from paints. Terms later revised. British Paints and the National Coal Board made a counter-offer. Dufay finally succeeded; they announced plans for expansion including a new factory
1968 Dufay's business model had been to buy paint from Japan which it sells directly. It had just completed a new factory at Shildon and bid to take-over International Paints but this failed when a key manager left the company and criticised their figures, the Take-Over Panel intervened, and Courtaulds offered to make a counter-bid