A LUCKY JOKE
WORTH A FORTUNE When an Italian labourer flipped a piece of cheese at a fellow-worker, he little knew that his action was to be of lasting benefit to his employers and to science. The phonograph makers- for whom he worked noticed a marked increase in the hardness of the copper discs from which phonograph records are stamped. When they sent samples of the plating bath to be analysed, the presence of an organic matter was revealed. On inquiry, it was found that the cheese had missed its mark and fallen into the tank in which the metallic discs containing phonograph records were being plated. The hardening effect was due to the casein in the cheese. They now add this material to their solutions, and the increased hardness of the copper allows a considerable saving, because more records can be stamped in molten wax from the harder discs.
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Sun (Auckland), Volume 1, Issue 65, 8 June 1927, Page 7
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150A LUCKY JOKE Sun (Auckland), Volume 1, Issue 65, 8 June 1927, Page 7
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