Blowing glass

A laboratory demonstration of this operation is far better than any written description. The tubes may be bought from many dealers e.g., A. Gallenkamp r Co. Ltd., Technico House, Christopher Street, London, EC2P 2ER, and Victoria House, Widnes, Lancs also The Scientific Glass- Blowing Co., 41 Upper Brook Street, Manchester 13), but students should learn to make their own c.apillary tubes. 

For a small amount of material (<0.1 g), the method is simple and easy, using the basic technique of glass blowing. A piece of borosilicate glass tube, 5-6 mm inside diameter and about 30 cm long, is washed and dried in advance (Fig. A.2, (A)). First, one end of the tube is sealed with a narrow flame of a gas-oxygen torch. This is done by heating... 

Mercury should not be left exposed in a laboratory. Reservoirs etc. should be covered with a layer of water or oil and, if practicable, the neck of the vessel plugged. The risk is increased by heating, e.g. due to spillage on a hot surface no glass blowing should therefore be done on mercury-contaminated glass. 

Park-Winder, W. E., 1947, Simple Glass-blowing for Laboratories and Schools London, Crosby Lockwood. 

Shenstone, W. a., 1889, The Methods of Glass Blowing, 2nd Edn London, Rivingtons. 

Wright, R. H., 1943, Manual of Laboratory Glass-Blowing Brooklyn, N. Y., Chemical PubUsWng Co. 

Frary, F. C., Taylor, C. S. and Edwards, J. D., 1928, Laboratory Glass Blowing, 2ndEdn New York, McGraw-Hill. 

The spindle makes a very useful handle for holding the tube while other glass-blowing is carried out, and owing to its much reduced diameter it does not become hot when the tubing is worked near to the end. The tip of the spindle can be cut off to attach a rubber tube for blowing. If for any reason an accurately central spindle is... 

The glass-blowing of the cell may be carried out in the order considered most convenient by the person making it, but we have foimd it most convenient to make the H first by making one T-joint in a bench torch and then making the second T-joint with the glass clamped, since this makes it easy to get the two sides of the H the same length. This means that the cell will stand firmly on the bench. 

Barr, W. E. and Anhorn, V. J., 1949, Scientific and Industrial Glass Blowing and Laboratory Techniques, Pittsburgh, Instruments Pubhshing Co. 

It is occasionally convenient, both when dealing with complex apparatus and when replacing a short section of a fixed glass tube, to be able to glass-blow two joints at once. This can siwcessfully be undertaken when the two joints are reasonably close together and accessible, and when the tubes involved are not larger than 15 mm diameter. 

Glass-Blowing more than Two Joints at once... 

In-place glass-blowing, 3 Internal seals, 73,100 Internal seals, large, 95... 

All B. D., 1921, A Handbook of Laboratory Glass-Blowing-, London, Routledge. 

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