Thermal insulation and gutenberg printing press: what they have in common

1. Step 1. Thermal insulation — is used in — Double glazing. An air gap.
2. Step 2. Double glazing — has part — Window glass. Two panes.
3. Step 3. Window glass — uses — Casting. The panes were cast in moulds.
4. Step 4. Casting — is used in — Linotype. It casts a line of type in metal.
5. Step 5. Linotype — evolved from — Movable type. Mechanized typesetting.
6. Step 6. Movable type — is part of — Gutenberg printing press. Text is set from metal type.

Open Evothings