Discussion in 'Coin Chat' started by ZoidMeister, Sep 24, 2020.
So how do I know if these old flips have PVC in them or not?
Thanks in advance.
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And as long as your electrons are running sir, the SAF type of flips are excellent for long term storage, but if loosely shipping coins, it has been seen that any edge or surface can scratch or rub-line the coin, so pack properly, such as putting the coin in a polypropylene baggy about 2x2 from Walmart or 99store ( we call them drug bags locally) and put that in a stiff flip. IMO, Jim
Non-PVC flips are hard and brittle.
This is the quick n' easy answer.
Oh well, they'll make good storage for my collection of parking lot find Zincoln's. Not really going to hurt their value or condition . . .
look like PVC, soft and puffy, but it's hard to tell from a photo.
The non-PVC can be broken in two by repeatedly flexing back and forth, like you might do with a piece of sheet metal...
I expect PVC plastic would break eventually, too; it would just take more repetitions.
I've had the non-PVC flips crack the first time I folded them.
How do you know that it isn't the copper burning green?
Non-PVC flips tend to lay completely flat (before they’re folded), whereas the flips you’ve pictured appear to have slight roll or bend at the seams.
As also Jeff B pointed out, even in a pack of new PVC-free flips, there will always be a few that will break when inserting a coin or folding them.
take a flip or a piece of a flip and put it in a glass with 2 tablespoons of salt dissolved in 8 ounces of water.
If it stays on the bottom it is PVC. If it floats it is polyethylene terephthalate (PET) and PVC free.
PVC sinks, Non-pvc containing plastics float.
this doesn't work with plastics that are trapping air then PVC might float of course.
usually in many cases, you can tell by feel, if it's soft an pliable doesn't break or tear without a lot of force, it's got PVC as a plasticizer.
if it's hard, rigid and brittle, it's non-pvc.
Not sure if the water test works for every composition out there, but it works with flips I've tried, or the windows on 2x2s if it was in question. if it's sinks, get rid of it.
Clean copper in a flame produce a bluish color . Some people do not clean the wire well enough and most modern wiring has PVC ( plasticized and flexible) as insulation. The copper has to be down to the metal, and a little bit of PVC will dominate as green flame if it remains. jim
I like this idea, but some quick Googling indicates that both plastics have the same density (1.38g/cc).
A bit more digging turns up this table listing PET's density range as 1.3-1.4 and plasticized PVC at 1.3-1.7. But the same company, on another page, lists flexible PVC at 1.1-1.35.
So I'm not sure the float test will differentiate these two reliably.
I mean there's Acetate or polystyrene, Vinyl, mylar, a whole bunch of different materials. it's not really a catch all,
Generally speaking if you fold it and it seriously creases sharply, or breaks along the fold it's likely PVCfree.
if it bens and flexes and doesn't really crease at all, it's gonna have PVC in it.
The PVC ones are just fine for short term storage/packaging, you just don't want to leave a coin in them long term. A couple months tops really and I'd say more like to or from a coin shop or sale only.
Oddly enough, to get a good blue color in fireworks, you need copper and chlorine.
Thanks for sending me down a pyrotechnic Googling rabbit hole, btw, didn't need that chunk of lunch hour anyhow. Now I know that you can't use indium to get a good blue flare, even if you can afford to burn it.
Me too, and not just as regards PVC. I throw out scuffy old flips or other people’s scrawly 2x2 holders regardless, and put stuff in fresh new flips.
JB. Curious the purpose of the salt? If the PVC sinks in salt water, wouldn't it also sink in tap water (fresh)? My thought, if the PVC sinks in salty water, it's specific gravity is higher then salty water, therefore it would also be heavier then fresh water too. Am I missing something?
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