Postage stamp paper and conveyor belt: what they have in common

1. Step 1. Postage stamp paper — is part of — Postage stamp. Watermarked paper.
2. Step 2. Postage stamp — has part — Perforated tear line. Teeth for tearing off.
3. Step 3. Perforated tear line — is part of — Toilet paper. Perforation lines.
4. Step 4. Toilet paper — is made of — Wood pulp. Cellulose.
5. Step 5. Wood pulp — is used in — Paper machine. The raw material.
6. Step 6. Paper machine — works like — Conveyor belt. Fourdrinier’s endless wire mesh moves like a conveyor belt, forming the web of paper.

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