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 iron itself is usually found in the form of magnetite, hematite, goethite, limonite or siderite. Ores carrying very high quantities of hematite or magnetite are known as natural ore or direct shipping ore, meaning they can be fed directly into iron-making blast furnaces.