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).
Testing Thomas Howse Ltd's 'Thermax' Fireproof Silencer Black Japan enamel.
| Identifier | ExFiles\Box 74\4\ scan0027 | |
| Date | 7th May 1925 | |
| X3067 MX.{John H Maddocks - Chief Proving Officer} c. Hs.{Lord Ernest Hives - Chair} BY8/H.{Arthur M. Hanbury - Head Complaints} 7.5.25. As you have tried a number of supposed fire-proof enamels previously on dynamometer test, for a number of chassis, I am sending you herewith a tin of Thomas Howse Ltd's "Thermax" Fireproof Silencer Black Japan. It can be obtained in aluminium colour or grey. They state that it will stand flame for a considerable time without effect. I do not consider this type of thing is the right nature for the interior of gear box or engine case, as it has not sufficient body, but it might be of some use for hot pipe work. They state the material is oil-proof, water-proof, and petrol-proof. We would like you to leave us just a little and return the tin to us so that we can test these claims in our usual fashion. BY.{R.W. Bailey - Chief Engineer} | ||