"CDP - Raw Materials"
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4 November, 1935. Copy manuscript note from E S R Willmore to Mr Rollo concerning soluble arsenic and the preparation of a "CDP bath".
25 May, 1937. Copy manuscript note from E S R Willmore to Mr Valentine on the "Density of Arsenic and Soda Ash".
19 July, 1938. Technical report on sulphur used in Dip. Conclusion: "Sieving tests have shown that the sulphur used in CDP varies considerably in particle size. Cleaning of the sieves has not resulted in a very marked increase in coarseness."