Shomer-Tec always has some cool gadgets like these Fire Buttons intended as a last resort fire starter.
These standard sized buttons (3/4″ diameter, 5/32″ thickness) are available in two different materials: Ferrocerium and Magnesium. Ferrocerium is a synthetic pyrophoric alloy which produces hot sparks that can reach temperatures of 5400° F when rapidly oxidized by striking with a hard object. Magnesium shavings provide a highly efficient accelerant and serve as a super hot tinder. Fire is produced by scraping shavings off the Magnesium button, and then striking the Ferrocerium button to produce a shower of sparks which can ignite the Magnesium shavings in order to set fire to kindling material.
If you use these, remember that the buttons are flammable, so give it a solid think on where you attach them.
That could give a whole new meaning to ‘fire crotch’.
I kinda wonder how these react to being put through a washing/drying machine. Heat, lint, plus tumbling of clothes against metal could be a problem.
I imagine they’ve tested this so I’m curious how they avoided the risk (if there is one).
Washed and dried clothes with buttons sewed on, many times. No problems. Appear unfazed by the process and no fires.