How Industrial Materials Are Made
Six compact production journeys connect MatQuo’s material pages, market data and calculators. Each flow is deliberately simplified: plants and feedstocks vary, and the linked industry sources provide the authoritative process detail.
Plastics: feedstock to converted product
Many conventional plastics begin with hydrocarbon feedstocks. Refining separates crude oil into fractions such as naphtha; cracking produces smaller molecules including ethylene and propylene; polymerisation links monomers into polymers. PE and PP resin is commonly pelletised before film extrusion, injection moulding or another conversion process. Bio-based and recycled routes do not follow this exact fossil-feedstock path.
Paper: fibre to reel, sheet and corrugated board
Virgin wood is debarked and chipped before mechanical or chemical pulping separates fibres. Recovered paper can be repulped and cleaned as a secondary fibre source. On the paper machine, a dilute fibre suspension is formed on a moving wire, pressed and dried, then finished as reels or sheets. Corrugated packaging adds a later converting stage in which liner and fluting papers are combined.
Sources: CEPI papermaking process and CEPI definitions.
Steel: ore or scrap to finished product
Steel has two principal industrial routes. The integrated BF–BOF route reduces iron ore to hot metal and refines it into steel. The EAF route melts mainly recycled steel, sometimes with direct-reduced iron or hot metal. Both routes lead to casting, then rolling into coil, plate, sections, bar or rod; finishing can include cold rolling, coating or painting.
Source: worldsteel — steelmaking process.
Aluminium: bauxite to rolled or extruded product
Bauxite is refined into alumina using the Bayer process. Primary smelting then uses electrolysis to extract molten aluminium from alumina. The metal is purified and alloyed before casting into ingot, slab or billet. Rolling produces sheet and coil; extrusion forces heated billet through a die to make profiles. Secondary aluminium instead starts with sorted scrap that is remelted and refined.
Sources: European Aluminium — alumina production and primary aluminium production.
Copper: ore to cathode and semi-fabricated product
Sulphide ore is crushed, milled and concentrated by flotation before smelting and converting produce blister copper. Fire refining and anode casting prepare the metal for electrorefining, which deposits high-purity copper on cathodes. Oxide ores can instead follow leaching, solvent extraction and electrowinning. Cathode and clean scrap feed rod, tube, sheet, strip and busbar production.
Source: International Copper Association — copper life cycle.
Flat glass: batch to processed sheet
Silica sand, soda ash, limestone, dolomite and cullet are weighed and mixed, then melted and refined. In the float process, molten glass travels over a bath of molten tin to form a flat ribbon with controlled thickness. Controlled cooling in the annealing lehr relieves stress before cutting. Later processing can include tempering, laminating, coating and insulating-glass assembly.
Sources: Glass Alliance Europe — glass making and Glass for Europe — flat-glass value chain.
How to use these journeys
The stages explain where grades, dimensions and cost drivers enter the chain; they are not process-control instructions. Use the linked material pages for official trade context, the calculators for transparent planning arithmetic and the sustainability pages for source-bounded environmental data. Do not treat customs unit values as spot prices or a generic production route as a supplier-specific declaration.
Last reviewed: 20 September 2026.