Any One Use Pccb 2x2

First, sorry to necro this thread... But I got a good reason: I just got some PCCB 2x2's.

I'm migrating coins in my albums (that I suspect contain PVC) to 2x2's, so I got these. PCCB seems to be more reliable than other brands that are available in my country (other is Chinese brand with red box -- cheaper than PCCB, the other is even cheaper and has no box/brand!).

First shipment arrived yesterday, this seller has the size not available from the second seller:

Second shipment from the second seller arrived today. He is the cheapest seller for PCCB 2x2's with just $1.1 per box of 50 (most sellers are close to $2 per box).


These 2x2's have cardboards that are decent in thickness and rigidity. The folding marks are all easy to fold. Even the outer parts sometimes are not perfectly aligned, the circle cutouts are always perfectly aligned.

I'm okay with trusting all my coins in these 2x2's, even though the most expensive coin I have is just a bit above $30. I imagine if I have coins up to around $100 worth I'll still trust these 2x2's.

I hope these information can help

I use those ones too..



From ebay :
https://www.ebay.ca/itm/371366324381

From the company :
http://www.pccb.cc/Product/Product.aspx?pid=66

i love the lighthouse self-adhesive flips but I must say I've never tried the PCCB brand.

I have been using these for a few years now and I haven't noticed any problems with coins. One thing that did concern me though, is sometimes the clear window feels more like rubber than mylar.

Steve

Pure PVC, by itself, is mostly harmless to coins. It is also not entirely transparent, and quite hard and brittle. Not very useful for making coin holders out of, but it is awfully cheap to produce, which is why people keep using it if they can get away with it. To make it transparent and flexible enough for use in coin holders, they have to add extra chemicals - plasticizers - to the PVC. It is those plasticizers, not the PVC itself, which leaches out over time, becomes acidic, and attacks the coins.

Plasticizers can be added to plastics other than PVC, of course. So a company can make "PVC-free" coin holders that are still chock-full of plasticizer, and therefore still quite damaging to coins in the medium and long term. As a general rule, if the plastic feels too "stretchy", then it's probably plasticized and therefore suspect.

The problem with buying items like this from China is not that they're all low quality, it's that the quality is unpredictably inconsistent. Because the company doing the exporting to Western customers is often itself relying on different manufacturers and sources from within China, all of different quality. So you can buy two boxes from the same supplier on the same day, they look the same but they were made at different times and in different places. The first box might be fine, lulling you into a false sense of security, then the second box is a wrong'un.

Thank you for the explanation on PVC and plasticizers. The test is not easy to do so far, because the need for a bunsen burner. I may be able to access one at work, but it is shutdown right now.