I have a Jackson welding helmet I got with an inexpensive mig welder. It says Class 3 and 4 inside. I read that # 12 or darker is required, but can't find any conversion information and it isn't worth frying my retinas on Monday.
Does anybody the conversion, if the question makes sense?
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Does anybody the conversion, if the question makes sense?

Sent from my iPhone using Tapatalk
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