I heard a joke about the space pen - millions spent developing a pen that will work any way up and in any temperature. And the Russians used a pencil

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I don't know if a pencil would really work in the cold (anyone got a walk-in freezer to test it?) but those rotary pencils with retractable leads might suit if you have budget constraints. Otherwise I would have suggested what MsMarieH has - the space pen.
Bethalize
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