Home› World & Ancient Coins Forum
Options

OT? question about packaging

kuhlikuhli Posts: 501
in World & Ancient Coins Forum
what is the material that the RCM uses for their mint sets? is it safe for long term storage? I have seen lots of sets from the late 60's and early 70's, but never noticed any abnormal toning or spotting or anything, so I have always figured it must be something decent. I am not a US collector, but I think the US mint sets use the same (or a similar) material, don't they?
I'm not afraid to die
I'm afraid to be alive without being aware of it

image

Comments

  • 1960NYGiants1960NYGiants Posts: 3,532 ✭✭✭✭
    I heard the term "pliofilm" many years ago and still use it today. I do not know what the actual name of it is. Charlton's even uses "pliofilm".
    Gene

    Life member #369 of the Royal Canadian Numismatic Association
    Member of Canadian Association of Token Collectors

    Collector of:
    Canadian coins and pre-confederation tokens
    Darkside proof/mint sets dated 1960
    My Ebay
  • BailathaclBailathacl Posts: 1,042 ✭✭✭
    The following is according to the International Rubber Research & Development Board (and no, I never thought I'd ever type those words):

    "Pliofilm, a modified form of natural rubber namley [sic] rubber hydrochloride, was marketed by Goodyear in the late 1930s. The transparent film was used as a packaging material and even as a form of waterproof material for clothing. In many respsects Pliofilm anticipated PVC."

    By this I conclude that Pliofilm both predates PVC and lacks its nasty propensity to damage coins. That would explain why so many Canadian Mint Set coins have been in contact with Pliofilm for so long without getting PVC death/damage. I hope this is the case anyway.

    "The Internet? Is that thing still around??" - Homer Simpson
Sign In or Register to comment.