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 New England colonies were settled largely by farmers, who became relatively self-sufficient. Later, aided by the Puritan work ethic, New England's economy began to focus on crafts and trade, in contrast to the Southern colonies, which had to import many goods from England.