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).
Specification sheet for Prices Oil, detailing its physical and chemical properties.
| Identifier | ExFiles\Box 144\1\ scan0131 | |
| Date | 16th March 1926 guessed | |
| SPECIFICATION OF PRICES OIL. Appearance in ¼" cell .... Dark orange, transparent, bright, greenish fluorescence. Specific gravity at 60ºF 0.9032 Efflux Time (Redwood) seconds. at 70ºF 1920 at 140ºF 226 at 212ºF 65 Flashing-point (close test) 398ºF.{Mr Friese} Cold test (setting-point) 20º - 23ºF.{Mr Friese} Volatility (loss in weight in 1 hr. at 370ºF.{Mr Friese} in a current of air). 7.70% Free fatty acid 0.4% Composition:- Mineral oil............ 88.8 Fixed oil................ 11.2 -------------------------- 100.0 ========================== The results of a detailed examination of the fatty acids (and alcohols) separated from the mixtures indicate that the fixed oil contained in this oil is a mixture in equal parts by weight of sperm oil and a non-drying oil, mostly probably lard oil. | ||