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).
Comparison of water absorption by weight between Bakelite and Bone grey fibre after immersion.
| Identifier | ExFiles\Box 69\1\ scan0349 | |
| Date | 29th June 1920 | |
| ROLLS-ROYCE LTD. INSTRUCTIONS. RR 238 (150 BKS.) (SH57. 29-6-20.) MP 224358 19 Order No. WA{Mr Wallis} 74 (2) Weight of Bakelite before immersion = 1.179 grammes Weight of Bone grey fibre before immersion = 1.452 grammes Weight of Bakelite after 120 hrs immersion in water = 1.191 grammes Weight of Bone grey fibre after immersion = 2.114 grammes Increase in weight Bakelite .012 grammes Bone grey fibre .662 grammes This means that the Bone grey fibre has absorbed 45% of its own weight, of water, whereas the Bakelite has only absorbed 1.0%. Signed H.E.W. This Sheet must be filed on completion of the work. | ||