Plain-language definitions of 133 terms used in raw material trade: Incoterms, payment, shipping, customs, quality documents, plastics, metals, chemicals, agriculture and energy.
The weight in grams of one square metre of paper, board, fabric, nonwoven or film (ISO 536, ISO 3801). Typical values: newsprint 40–48, office paper 70–80, kraftliner and fluting 100–440 g/m²; T-shirt jersey 140–200 and denim 300–450 g/m²; a face-mask meltblown layer 20–25 g/m². Grammage drives price and strength directly but is not enough on its own: specifications should also include burst (Mullen), ring crush (RCT) and edge crush (ECT) for board, and tensile and pilling resistance for fabric.
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