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).
Instructions for a component's brightening process involving material removal and addition.
| Identifier | ExFiles\Box 162\4\ img273 | |
| Date | 30th March 1937 guessed | |
| Remove .020 initially add .030 brightening and machine to original thickness prior to removal of .020 for brightening | ||