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How airtight are the US Mint Lenses?

rooksmithrooksmith Posts: 971 ✭✭✭✭
in Q & A Forum

I've started to notice a little bit of toning on a few coins in proof sets. I'm not a big fan of toning on mirror-like surfaces of relatively new

“When you don't know what you're talking about, it's hard to know when you're finished.” - Tommy Smothers

Comments

  • rooksmithrooksmith Posts: 971 ✭✭✭✭


    Note the yellow toning.. Better than the black mold, IMHO, but really they should do a better job of sealing and keeping moisture out.

    “When you don't know what you're talking about, it's hard to know when you're finished.” - Tommy Smothers
  • Mr_SpudMr_Spud Posts: 5,475 ✭✭✭✭✭
    edited August 2, 2022 1:22PM

    I’m think it’s airtight enough to lock in gasses given off by the flag-printed insert that surrounds the coins which is probably causing toning.

    Mr_Spud

  • Namvet69Namvet69 Posts: 9,010 ✭✭✭✭✭

    In my experience, the fit varies greatly. Peace Roy

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