Season 17 Episodes13
Cast1

Lynne Adams
Narrator (voice)
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Ranked #5 of 13 in Season 17•matches the season avg
Supportive boots are fitted with long, carefully aligned blades to create speed skates. Chemical ingredients are polymerized and compounded into synthetic rubber, cocoa beans are fermented and dried after harvesting, and roasted beans are ground, refined and blended into bulk chocolate.

Lynne Adams
Narrator (voice)
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"Speed Skates, Synthetic Rubber, Cocoa Beans, Bulk Chocolate" is episode 7 of How It's Made season 17. It scored 7.4/10 from 20 votes, ranking #5 of 13 episodes this season (season average 7.4). It aired on May 13, 2011.