Brushes/Blackboards/Smoked Salmon/Zips

Series 4 - Episode 6 Brushes/Blackboards/Smoked Salmon/Zips

Thursday 6:30am - 7am Discovery Channel
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Thursday, 6:30am - 7am Discovery Channel HD
Thursday, 7:30am - 8am Discovery Channel +1
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Summary

The production of brushes, blackboards, smoked salmon and zips, and the ways in which their manufacturing processes have evolved.
Science