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).
Instruction mandating the hand blasting of specific parts prior to the final plating operation.
| Identifier | ExFiles\Box 10\3\ 03-page188 | |
| Date | 10th April 1939 | |
| M.E.L. Technical Office 432 / 10.4.39 SPECIAL FINISH Hand Blasting We are at no time to depart from the original instruction on drawing F.T.B. 200.4. that the parts are to be hand blasted prior to the final plating operation. It is considered that by adhering to this instruction the present trouble of parts coming to pieces during the plating process will be obviated. This instruction also applies to Drawing E.B. 7604. (Signed) | ||