Abstract
WE have received from Messrs. Oxo, Ltd. (Thames House, Queen St. Place, E.C.4), samples of metal caps for test-tubes. These caps have been used for some time in their laboratories, and Messrs. Oxo offer to supply them free of charge to other laboratories which ask for them. The caps are intended as a substitute for cotton wool plugs, and Messrs. Oxo claim for them the following advantages : test-tubes of media fitted with the caps remain sterile for long periods ; there are no fibres to contaminate the media ; tubes fitted with the caps can be sealed with 'Cellophane' ; the caps can be labelled with an ordinary pencil and this labelling withstands auto-claving; they are easily removed and replaced and do not stick to the mouths of the tubes ; the caps last a long time and can be cleaned by boiling in 0·5 per cent caustic soda, followed by rinsing and drying. The caps appear to be made of an aluminium alloy and are supplied in three sizes to fit standard test-tubes with outside diameters of , ¾ and 1 in.
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Metal Caps for Test-tubes. Nature 162, 920 (1948). https://doi.org/10.1038/162920b0
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DOI: https://doi.org/10.1038/162920b0