Pic unrelated

    • Warl0k3@lemmy.world
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      11 months ago

      It’s oil from your skin. The pretty heat colors on the stainless steel are a result of oxidization of the metal, which reaches different depths as it gets hotter - but if the metal is heated rapidly enough, or to a low enough temperature the steel will begin to discolour before the oils burn off. Since the area with skin oil on it has a barrier between the metal and the oxygen (the oil), the outline of the hand is prevented from gaining a color and thus it shows up like this.

      • espurr@sopuli.xyz
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        11 months ago

        Ah ok that was interesting to learn and also that it’s just oils from skin

        • Warl0k3@lemmy.world
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          11 months ago

          It’s neat to see in person, with a light touch you can easily see the distinct patterns of a person’s fingerprints outlined in some really pretty colors.

    • shalafi@lemmy.world
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      10 months ago

      You got a solid explanation but I’ll add this; No one could press their hand on that hot engine long enough to make a perfect print like that. Somebody did it for giggles.

        • BurntWits@sh.itjust.works
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          10 months ago

          My name is Elongated Musket and I’m worth half a quintillion dollars and I have 800 kids who all hate me and I’ll die alone with my fortune and wood stove collection and no one can stop me and—