开云体育

I had been unable to find the specific Staedtler #318
Lumocolor locally.

But I see Office Depot carries a Staedtler Lumocolor
pen meant for marking directly onto non-coated CDs.
Which means ultrasmooth, which means they should work
on copper.

Listed as waterproof and permanent. I'm going to pick
one up and try it. I'll let you know how it works.

Steve

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