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).
Trials of 'Apex' and 'Optical' black enamels for use on cylinders and radiators.
| Identifier | ExFiles\Box 38\6\ Scan197 | |
| Date | 2nd December 1919 | |
| To BY.{R.W. Bailey - Chief Engineer} from EH. E.F.C. X.3658 EH1/LG2.12.19. X.3658 RE BLACK ENAMELS. X.3456 We have sent into Mr. Roscow two quart jars of Summit black enamel. One is "Apex" cylinder black and the other is "Optical" black lacquer. We have tried each of these enamels on a set of cylinder blocks and consider that either of them is a very great improvement over what we are using at present on the cylinders. They give a dull matt black finish which does not rub off and which does not appear to be effected by oil. We consider that it also might be a very good black for the radiators because it is a real dull-black and drys in about 5 minutes. We suggest that you instruct Mr. Roscow to try this on a radiator. EH. | ||