I wouldn't agree with this. Any coin will be affected by long term exposure to PVC. Most of us know the difference in flips and are smart enough to use another holder for long term use. Still, it surprises me to receive coins in PVC flips. They go to the garage quickly. Lance.
I agree about the documentation but with a good label maker and software a lot more can be saved than depending on hand written info. It is a great deal of work but for neatness and clarity it works for me.
I thought those flips sold and used at coin shops were maylar flips. I bought a few loose ones at one shop and the other just gave them to me since I buy coins as well. Some are stiffer and clear. Is this flip Mylar?
Don't count on that. The acids that accumulate in the PVC residue will attack other metals as well. It is most noticeable with copper containing alloys because of the distinctive green color of the resulting copper compounds.
I didn't say that other metals were immune to attack, but they certainly can survive longer in PVC flips, like a dealer's inventory, than copper-based coinage. I recently bought a collection of nickel-only struck coins, that had resided in PVC flips for almost 35 years (the old Coindex boxes and flips). True, there was a thin green film on some of the coins, but a simple rinse in acetone and the nickel coins were perfectly fine, with no permanent damage. I probably would have cried if this particular collector had Victorian or Edwardian Canadian silver 50c coins or something in those old Coindex flips. I certainly don't support using PVC flips; my personal preference is mylar 2x2 flips.
I use a pair of small scissors to put cardboard incerts into flips. Just turn them until they are almost flat and they won't cut anything. Certs slide right in. You can even move them side to side and get them to go all the way in.
You want to hold the incert in the scissors but you want the scissors nearly flat so you don't cut cardboard. When you insert the card into flip, the scissors will seperate the plastic making it easier to put the card in. They tend to jam up when they are about half way. The scissors will lift the plastic so you can get the rest of the card in. It takes seconds to do it this way instead wrestling (hope the Olympics doesn't have Sumu wrestling.) with it with your fingers.