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solar pyrography

 
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Caught the mention of a solar pyrography tool on podcast 300. Have you got any more details? I assume that we are talking about a tad more than a magnifying glass here.

CK from the UK
 
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I think that he might have been referring to the magnifying glass some people used to do wood burning.

These were burnt with a magnifying glass: https://permies.com/t/40114/permaculture-projects/Signs#312266

Not at the labs, but Beau did woodburning with a magnifying glass for his PEP: https://permies.com/wiki/10/99526/PEP-BB-dimensional-sand-sign#925624

I'm pretty sure there's pictures in one of the Boots threads of someone doing the woodburning with the magnifying glass, but I don't remember who posted it...
 
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