Welding glass to view the sun: is it safe?

[@andycopeland7051]

I used iso glasses in 2017 and it worked to protect my eyes but i left me vulnerable to unanticipated problems with my intestines which i still live with.

[@TimothyOBrien1958]

My father was a professional welder. He said that the light from an arc welder was brighter than the sun.

[@erewhon42]

I could see that. The light is very concentrated. Not to mention, the welder is so close to it.

[@Ender_Consolidated]

AFAIK, NASA recommends shade 9 at least.

[@MysteryGrey]

Too late, I've already done it.

[@erewhon42]

I presume it was fine? What shade level did you use?