a) Lacquering
b) Canning
c) Electroplating
d) Annealing
Answer: d
Explanation: Annealing is the process which reduces the residual strain after the extrusion process. Films can be annealed by the application of heat to partially relax the forces while maintaining the film in a highly stretched condition. It is then cooled to room temperature and the restraint on the film released.
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