Firesteel made of carbon steel, rolled up

Carbon steel is crucial for traditional firesteels because it is hard enough to split off tiny, glowing metal particles when struck with a flint, producing sparks. Easily ignitable tinder such as birch bark, fatwood, or cotton wool works best, while materials specially prepared for flint striking, like charred cotton, are ideal for safely catching the sparks.

A firesteel offers a decisive advantage over matches or lighters in that it is extremely robust and reliably produces sparks with a temperature of up to 3000 °C, even in wet conditions, strong winds, or rain. While lighters can fail or run out of igniter in cold weather, and matches become unusable when damp, a firesteel always works and lasts for thousands of ignitions.

To prevent corrosion in a carbon steel firesteel and ensure its functionality, the following care and storage techniques are necessary: ​​- Cleaning and drying: Clean the firesteel after each use and dry it thoroughly, as moisture is the primary cause of corrosion.

- Oiling when not in use: If the firesteel is not used for an extended period or is stored in a humid environment, it should be lightly rubbed with a low-acid oil (e.g., camellia oil or simple vegetable oil).

- Dry storage: Store the firesteel in a dry place.

- Accepting patina: A dark layer (patina) that forms over time is normal and provides some additional protection against deeper rust.

- Removing rust spots: If surface rust does form, it can be carefully removed with a sponge; avoid using abrasive materials such as steel wool.

When struck or scraped with a hard edge, tiny metal particles are removed from the firesteel. These fine shavings ignite spontaneously in the air due to the heat generated by friction (pyrophoric effect). Since they burn at extremely high temperatures of approximately 2,700 to 3,000 °C, they provide enough energy to exceed the ignition temperature of dry tinder and ignite it.