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In the summer of 1984, Svetlana Savitskaya and Vladimir Dzhanibekov tested one of the most important repair methods ever, welding and brazing metal samples in the vacuum of space.

A still softer brazing metal is composed of half copper, three-eighths zinc and one-eighth tin.

The spatula is used for placing the brazing metal on the work and for handling the flux that is required in this work as in all other similar operations.

Flux.—In order to remove the oxides produced under brazing heat and to allow the brazing metal to flow freely into place, a flux of some kind must be used.