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).
Note detailing a four-step heating process with specific temperatures and durations.
Identifier | ExFiles\Box 164\3\ img108 | |
Date | 13th January 1938 guessed | |
220°F.{Mr Friese} for 2 Hrs. 250°F.{Mr Friese} for 40 mins. 275°F.{Mr Friese} for 20 mins. [Illegible] for 30 mins. BY/RD. | ||