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).
Test report comparing the electrical resistance properties of Redmanol and Bakelite x616.B powders under various processing conditions.
| Identifier | ExFiles\Box 61\1\ scan0100 | |
| Date | 8th December 1924 | |
| RR 238 (150 BKS,) (DB{Donald Bastow - Suspensions} 461-8-12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To __________ Order No. PD49 (2) Customer's No. __________ Bakelite x616B powder, but with the powder first compressed into a "biscuit", and warmed at a temperature of 60°C, and the biscuit put into the mould instead of the powder direct. For purposes of comparison, the results of these latter tests are given below with the others. | Material and Particulars | Ratio in Megohms. | |---|---| | | 20°C | 80°C | 100°C | | Powder used direct. | Direct from mould | Redmanol | 118.7 | 12.3 | 7.3 | | | Bakelite x616.B | 630 | 20.9 | 13.2 | | | After one subsequent baking. | Redmanol | 1,430 | 25.7 | 18.8 | | | | Bakelite x.616.B. | 2,080 | 52.6 | 35.1 | | Powder first formed into a biscuit. | Direct from mould | Redmanol (B) | 5,495 | 46.1 | 26.9 | | | | Bakelite x.616.B. (B) | 1,830 | 28.3 | 18.8 | From these results we can now say that the Bakelite x616.B material submitted is as good Signed Cont'd.{John DeLooze - Company Secretary} This Sheet must be filed on completion of the work. | ||