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typodupeerror

Comment welding glasses? (Score 1) 150

Should be I think -8 or somewhere close (not common), I use a -4 with dichroic coating as well as an additional layer of an active welding filter. Even a scratch can be problematic. I would never trust a 1/1000" plastic filter for anything not replaceable even though the active filter may only be 1/10^100th thick on either..

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