Abstract
THE high viscosity of whole shellac when liquefied, and the difficulty of maintaining it fluid for any considerable length of time, were responsible for the failure of the original experiments to molt and spray it under steam pressure. We have received from the London Shellac Research Bureau, India House, Aldwych, London, W.C.2, a pamphlet describing the work done by K. E. Lalkaka in the laboratory of chemical engineering of University College, London, on behalf of the Indian Lac Cess Committee and under the supervision of Prof. H. E. Watson. The later experiments described were directed towards using pulverized shellac and causing the powder to fuse by passage through a flame, the fused particles being projected upon a surface to form a well-bonded coat. The various means tried for securing a steady supply of the pulverized material to the flame are described and also the development of a simple apparatus for carrying out the process effectively. A study has been made of the operating conditions.
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Hot Spraying of Shellac. Nature 144, 936 (1939). https://doi.org/10.1038/144936c0
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DOI: https://doi.org/10.1038/144936c0