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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).
Product information sheet for Lamplac spirit lacquer and Invarine insulating spirit varnish.

Identifier  ExFiles\Box 24\2\  Scan176
Date  21th September 1921 guessed
  
The Insulating & Waterproofing Compounds Company
(J.{Mr Johnson W.M.} HENDERSON, D.Sc. M.I.E.E.)
99, CURTAIN ROAD, LONDON, E.C.

"LAMPLAC."

"Lamplac" is a Spirit Lacquer specially manufactured for colouring the bulbs of incandescent lamps, and is supplied in a variety of colours: Violet, Mauve, Blue, Green, Yellow, Orange, Amber and Ruby, also Frosting. The application of this Lacquer does not render the bulbs opaque, but leaves them quite transparent, giving the appearance of coloured glass. When dry it forms a smooth coating on the glass which will not rub off or wash off with water.

Lamps can easily be lacquered by an unskilled person in a few minutes. The lamp bulb should first be thoroughly cleaned with soap and water, or methylated spirit, to remove all traces of grease from the glass, it is then dried by switching on the lamp. When quite dry the lamp with the current still on is dipped into a vessel filled with the Lacquer, on removing it is allowed to drip till all the excess Lacquer has run off, and it will be found that the film on the bulb will be quite hard in about five minutes.

Lamps coloured by "Lamplac" may be used for Theatrical Effects, Electric Signs, Lighting Effects at Carnivals, Fetes and Seaside Promenades and Piers.

If desired, customers may send their lamps to us for colouring, or we can supply the lamps coloured as required, if the Candle-power and Voltage are stated.

"INVARINE."

"Invarine" is an Insulating Spirit Varnish for application to metal surfaces. It rapidly air-dries, and will withstand the effects of heat without becoming brittle and splitting off.

"Invarine" may be used to paint over the metal cheeks of bobbins in telephone receivers, soldered joints at the ends of commutator bars, screwheads, etc.
  
  


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