Ahhh. The ole thorium radiation machines !
if you're lucky.
Peerless brand has multiple manufacturers. One in India was producing thorium mantles a while back still.
Yttrium is more common today. Though a duller around -20% of thorium glow.
Don't ingest /huff/ broken burned ash of mantles. Maybe even don't rub them onto bare skin.
Vintage mantles remain sought after ; and imports abound.
Current Coleman produced mantles are junk. Which is disappointing given it is Coleman.
Not because of switching to yttrium. But because even new mantles can /do get holes blown in them prematurely. it's in the material and the weave. Though a burned in mantle is really just a high temp cage of ash with the ghost of Thorium or Yttrium glowing when heated..
And a jet of heated gas from a crap mantle hitting the globes glass will prevail in time. There are permanent discolored spots on some to prove it.
And a jet of heated gas directed by a hole in a mantle at a fuel source is going to pose more risk to a user than a thorium mantle. Newer lanterns (white gas production isn't supplying the domestic market any of late)
have a heat shield between frame and fount.
Those without but containing a Shrader valve (oh my goodness Coleman what have you done?) I've added a shield to.
Crap mantles burning holes into a fuel tank potential? What an insult to the founder and history.