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E. G. Acheson of Prince Rock, Plymouth. Also, of 9 Gayfere Street, Westminster, S.W.1.
Founded by Edward Goodrich Acheson.
1890 Discovered Carboundum. 
1910 "The firm of Messrs. E. G. Acheson, Limited, was established in 1910 for the manufacture of graphited lubricants in this country, and a factory was erected at Plymouth. An illustrated description of these works appeared in Engineering, vol. xcvi, page 773 (1913), and it is there stated that Plymouth was chosen because an ample supply of soft water, essential to the manufacture of aquadag, was available."
1913 Consolidated the various companies making Oildag and Aquadag lubricants to be operated from the company head office in Chancery Lane; manufacturing in England was moved from Camborne to Plymouth and enlarged
1937 Manufacturers of "dag" brand colloidal products. "Oildag" Colloidal Graphite Products.
1940 Advert for lubrication.
1945 Advert for colloidal graphite.
See Acheson Colloids