Drawing and Annealing the wire
The wire produced was then drawn through a succession of drawing
machines, each time becoming longer and thinner. Sometimes the
drawings continued until the wire was only 0.25mm thick.
It was also annealed by heating to soften it and restore some of
its properties after having been stressed by the drawing.
The annealing could either be:
- strand annealing, where individual strands of wire are passed
continuously through an oven, OR
- batch annealing, where whole coils of wire were lifted to
an area where a cover would be placed on top and they would be
The photograph above is wire about to be batch annealed.