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 use of iron for weapons started at various times. In the Middle East and southeastern Europe, iron began being used as early as 1200 B.C.E. In China it was used around 600 B.C.E. By 1000 B.C.E., however, the knowledge of making iron weapons was widespread.