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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).
Explaining the enameling process used to create the black finish on Weston instruments.

Identifier  ExFiles\Box 38\6\  Scan177
Date  21th April 1919
  
S.N.
5 MAY 1919
X.3424
N.Y.
6 MAY 1919
ROLLS-ROYCE, LIMITED
15 BROAD STREET
NEW YORK
TELEPHONE HANOVER 2155
April 21, 1919
OY8-F21/4/RECEIVED
EFC from OY:-
Copies PHR and Mr Barrington
1. Some time ago when I was in England, you asked me to ascertain how the black finish was obtained on Weston instruments.
2. These people now inform me that this is simply an enameling job. The metal cases of the instruments are sand-blasted, and are then enameled with an air brush and baked.
OY
J
  
  


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