| 1/00 | Fibreboard (preparation of pulp compositions or addition of chemical agents D21B, D21C, D21H; formation of the wet web D21F) |
| 1/02 | Fibreboard (preparation of pulp compositions or addition of chemical agents D21B, D21C, D21H; formation of the wet web D21F) Cutting, e.g. using wet saws |
| 1/04 | Fibreboard (preparation of pulp compositions or addition of chemical agents D21B, D21C, D21H; formation of the wet web D21F) Pressing |
| 1/06 | Fibreboard (preparation of pulp compositions or addition of chemical agents D21B, D21C, D21H; formation of the wet web D21F) Drying |
| 1/08 | Fibreboard (preparation of pulp compositions or addition of chemical agents D21B, D21C, D21H; formation of the wet web D21F) Impregnated or coated fibreboard |
| 1/10 | Fibreboard (preparation of pulp compositions or addition of chemical agents D21B, D21C, D21H; formation of the wet web D21F) After-treatment |
| 1/12 | Fibreboard (preparation of pulp compositions or addition of chemical agents D21B, D21C, D21H; formation of the wet web D21F) After-treatment Hardening |
| 1/14 | Fibreboard (preparation of pulp compositions or addition of chemical agents D21B, D21C, D21H; formation of the wet web D21F) After-treatment Conditioning |
| 1/16 | Fibreboard (preparation of pulp compositions or addition of chemical agents D21B, D21C, D21H; formation of the wet web D21F) Special fibreboard |
| 1/18 | Fibreboard (preparation of pulp compositions or addition of chemical agents D21B, D21C, D21H; formation of the wet web D21F) Special fibreboard Hardboard |
| 1/20 | Fibreboard (preparation of pulp compositions or addition of chemical agents D21B, D21C, D21H; formation of the wet web D21F) Special fibreboard Insulating board |
| 3/00 | Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds |
| 3/02 | Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds of rings |
| 3/04 | Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds of tubes |
| 3/06 | Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds of stoppers |
| 3/08 | Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds of bobbins |
| 3/10 | Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds of hollow bodies |
| 3/12 | Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds of sheets; of diaphragms |
| 5/00 | Manufacture of hollow articles by transferring sheets, produced from fibres suspensions or papier-mâché by suction on wire-net moulds, to couch moulds |
| 7/00 | Manufacture of hollow articles from fibre suspensions or papier-mâché by deposition of fibres in or on a wire-net mould |