Polypropylene - Coin Community Forum

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Author	Replies: 4 / Views: 1,895
thatguy71 New Member United States 22 Posts	Posted 10/31/2007 11:54 am I was wondering if anyone knew about this type of plastic; is it safe or harmful? Obviously I don't want anything with PVC but this type of plastic is some old baseball card protective sleeves I had left over from years ago and coin slabs fit perfectly in them. I know that slabs aren't necessarily airtite so I didn't want any damage to happen to any coins I have slabbed if I slip them in these for added scratch protection. My theory is since they were made to protect paper, then maybe they are safe for coins as well? yea or nay? Report this Post to the Staff

amac44 Member United States 3242 Posts	Posted 10/31/2007 12:00 pm maybe But I would keep an eye on them for sure! Report this Post to the Staff
thatguy71 New Member United States 22 Posts	Posted 10/31/2007 12:10 pm Ok I think I found the answer to my question. I looked into it and one site was selling the mylar covers with this plastic. Also another site was selling coin tubes made of this material. But I'm still open to hear anyone's " Two Cents" on the subject. (Sorry I couldn't help myself) Report this Post to the Staff
biokemist6 Bedrock of the Community United States 12437 Posts	Posted 10/31/2007 1:59 pm Polypropylene sleeves should be perfectly safe for storing coin slabs. It is a plastic used in many food packaging applications and I have many PP containers in my lab because it is also solvent,acid, and base resistant. PP is also resistant to autoclave sterilization conditions (250F 22psi steam sterilization). It is commonly referred to as #5 plastic for recycling purposes and if you have any plastic food containers in your fridge, I bet some of them are #5. Report this Post to the Staff
thatguy71 New Member United States 22 Posts	Posted 10/31/2007 2:05 pm Biokemist, Thanks! Report this Post to the Staff
	Replies: 4 / Views: 1,895

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