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Old 17th July 2019, 20:18   #7
T-Cut
This is my second home
 
Rover75 and Mreg Corsa.

Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
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I guess you'll be looking for something like this (which in this case is a fluorescent coolant dye under UV).



(That's a ball point pen stood on the Petri dish.)

TC

Last edited by T-Cut; 17th July 2019 at 20:21..
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