PVC free flips.

I just received these PVC flips from eBay.


Description claims that ...

• Made with archival safe crystal clear vinyl plastic which is chemically inert & PVC free.

I was able to repeatedly bend the corner many times with out it cracking. I think even soft flips would crease if bent sharply so, another method in NGC's "HOW TO TELL IF FLIPS HAVE PVC'S" requires burning the flip...

I don't understand the copper-flame test. Can someone explain how to do that? ​

 

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Perhaps @desertgem can explain it for you.

 

The words you want see are: Polyethylene Terephthalate.

 

I tried to say that out loud and think I broke a blood vessel.

 

Ohhh, PET !!
Well this makes sense...

PET, PETE, or the obsolete PETP or PET-P), is the most common thermoplastic polymer resin of the polyester family and is used in fibres for clothing, containers for liquids and foods, and thermoforming for manufacturing, and in combination with glass fibre for engineering resins.

It may also be referred to by the brand names Terylene in the UK,[5] Lavsan in Russia and the former Soviet Union, and Dacron in the US.

Bio-PET is the bio-based counterpart of PET.[6][7]

The majority of the world's PET production is for synthetic fibres (in excess of 60%), with bottle production accounting for about 30%.

 

So, I just spent the better portion of my morning learning about PET's and I'm being led to believe that Polyethylene Terephthalate is a generic name for Dupont's Mylar.

 

You sound like you're ready to become a member of The Secret Circle of Free and Accepted of Organic Chemistry Fanciers.

Brother @Kentucky should be along to show you the secret handshake.

 

I believe that the flame test they’re referring to is the Beilstein test. This test is a qualitative test to determine if there are any halogens (i.e., chlorine, bromine, iodine, but not fluorine) in a compound. I’ve gotten to see this test conducted a couple of times, and it’s visually impressive.

Here’s a video that discusses how the test works:

 

After watching the video, I found that I got lost after about a minute (maybe less). It is far to technical for me to spend that much effort to find out if a 2X2 has dangerous compounds in them.
So, where can I find 2X2s that are safe for my coins. I bought some hard plastic coin holders for some of my collection. Because of my ignorance, I would rather replace all of my 2x2s and other coin holders than take a chance my coins can be damaged. Is there a location or website that can be recommended to furnish safe coin holders? I bought many 2x2s that advertised to be safe. Some of my most precious coins are in them. Thanks

 

I buy all of my supplies from Wizard.
https://www.wizardcoinsupply.com/product/saflips-2x2.html

 

I think I will try by heating the copper and melting the sample to the hot copper and then burning it, but I only have propane. I don't have benzaldehyde to perform a baseline. I'm not concerned either. I believe green is color to look for as this is the positive result for halides?? Am I close?

 

Yes, that was the first result when I searched "BoPET coin flips"

 

So far I am leaning towards the product recommended below...

 

Wizard is a good company. Amos Advantage (Coin World) also sells them.

 

Will it say the content of the 2x2s?

 

Usually packs of 50. Paper inserts are extra.
https://www.wizardcoinsupply.com/product/inserts-for-two-pocket-flips-2x2.html

 

Amos Advantage has better prices and ships free, at least all the items I've ordered.

 

Saflips. There's others but if you're storing coins i'd use those

 

There is a great source of info posted, which I found here, on coin talk about this. I feel like this thread did not get enough attention, It's a long one but it's everything I needed to know...
https://www.cointalk.com/threads/ev...about-coin-and-currency-storage-almost.51602/

 

I don't think many companies are very specific about the chemistry of there products which is why I wanted to know more about the burn test, AKA, "The Beilstein Test".