A thermoplastic is a type of plastic made from polymer resins that becomes a homogenized liquid when heated and hard when cooled.
As similar as colonial iron manufacture was to that of medieval Europe, yet it differed greatly from the type of iron manufacture in eighteenth century early modern Europe. Existing conditions of natural resources greatly affected the development of technical innovation in the field of iron manufacture.
The Middle Colonies had rich soil, allowing the area to become a major exporter of wheat and other grains. The lumber and shipbuilding industries enjoyed success in the Middle Colonies, and Pennsylvania saw moderate success in the textile and iron industry. The Middle Colonies were the most ethnically diverse British colonies in North America, with settlers coming from all parts of Europe. Civil unrest in Europe and other colonies saw an influx of immigrants to the Middle Colonies in the 18th century.