05 May 2015 0 7K Report

Sorry, sounds like a low-level question, but I have been searching high and low for years. Marker pens either rub off, wipe off, fade off. Without resorting to labels, is there any brand that withstands boiling, freezing and ethanol and is thin enough to write on microcentrifuge tubes (often 0.5ml) and their lids? And are there any coloured ones with same attributes? The standard "permanent" red/blue/green run at the first whiff of alcohol.

Tanks!

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