Shape paperboard flats by using formation moulds, which vacuum pulp and windsoft the excess material. Transfer the materials to a conveyor belt. Apply waterproof lubricants so the flats won't stick to the mould and put the flats in an oven, after which the rigid material is stacked and made ready to be packaged.
Data Source: Unified Global Standards (ISCED, ISCO, O*NET, ESCO)