A welding helmet?
https://www.bhphotovideo.com/bnh/controller/home?O=email&A=details&Q=&sku=1312580&is=REG
I’d trust these over a welding helmet for getting all the UV out.
From what I read, a welding helmet rated @ +14 will work just fine. Many moons ago (there’s a joke in there somewhere) we were told to make a hole in a box. Put your back to the sun and point the hole towards the sun. The eclipse image should appear on the other side of the box. I’m guessing I got a cloudy day. Didn’t see a thing.
Not just any welding helmet.
The lens used for arc welding are numbered.
For eclipse viewing Shade Number 14 is required.
Sold out everywhere long ago.
The Shades can be added, but if stacked total needs to be 15.
My rig uses a Shade Number 11 combined with a Shade Number 5.