Seasoned black patina and kiln: what they have in common

1. Step 1. Seasoned black patina — is part of — Cast-iron pan. Polymerized oil protects against rust and sticking.
2. Step 2. Cast-iron pan — evolved into — Non-stick pan. A frying pan.
3. Step 3. Non-stick pan — is made of — Teflon. A Teflon coating.
4. Step 4. Teflon — is material for — Air fryer. A basket with a non-stick coating.
5. Step 5. Air fryer — works like — Oven. An air fryer is a small oven where a fan drives the hot air.
6. Step 6. Oven — works like — Kiln. A kiln and a baking oven work alike: fire heats a closed chamber.

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