From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Hygroscopic test comparing the moisture absorption of Bakelite and Bone grey fibre.
| Identifier | ExFiles\Box 69\1\ scan0348 | |
| Date | 23th August 1924 | |
| RR 238 (150 BKS.) (SH57. 29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.B. Order No. W.A 74 Customer's No. X.4646 X4357 Hygroscopic test of ~~first~~ 2ND sample of Bone grey fibre This test consisted of a comparison between bakelite and bone grey fibre as to its susceptibility to the absorption of moisture. Accordingly a small sample of each material was procured, dried well, and placed in water for a period of 120 hrs! Each sample was carefully weighed before immersion and after so that the weight of water absorbed could be calculated. Signed contd This Sheet must be filed on completion of the work. | ||