Try a Sharpie pen. All you are looking for is it gets worn off or not.
> > Blue up the worm, and see whether it rubs off the crests or roots of > > the thread. > > I thought of that, but I don't know where I could src some of that > locally. Is "diechem blue" the right search term to feed google?? > -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
