Float glass and screw press: what they have in common

1. Step 1. Float glass — uses — Tin. Glass spreads out over molten tin.
2. Step 2. Tin — is used in — Linotype. A line is cast from type metal (lead, tin, antimony).
3. Step 3. Linotype — evolved from — Movable type. Mechanized typesetting.
4. Step 4. Movable type — is part of — Gutenberg printing press. Text is set from metal type.
5. Step 5. Gutenberg printing press — has part — Screw press. Gutenberg adapted the screw press known from pressing grapes.

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