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 Replies: 12 / Views: 2,563 |
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Pillar of the Community
United States
3499 Posts |
So what are your thoughts on vinyl flips as opposed to Mylar?
It seems like vinyl flips are softer and looser (although I presume that they do not contain PVC), but it allows for the coins to slide around too much. So this can be a bit annoying and could potentially cause a bit of abrasion to the surface of the coin after being jostled around a lot over a long period. Any other thoughts?
*** Moved by Staff to a more appropriate forum. ***
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Moderator
 United States
16679 Posts |
I don't use vinyl and never will. Spend the extra money and get good quality flips or better yet, Airtites. Your coins are worth it :)
swcoin.ecrater.com
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Bedrock of the Community
Australia
21786 Posts |
OK for temporary protection for coin show purchases only.
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Pillar of the Community
 United States
3499 Posts |
sel_69l- Why in particular do you think that it is only good for temporary storage? Just because the coins move around too much?
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Rest in Peace
United States
1501 Posts |
Another original storage choice, that has now been retired! Besides the vinyl being the "V" in PVC...their use as a storage device is less than adequate  even the Mylar ones have the same problems as vinyl, the coins change directions at will and make for a very messy page. I thought at first they would work great, working with my world coins with all of the different sizes and shapes... unfortunately (or fortunately depending on your outlook) the Mylar windowed 2X2 won out again! Scores Koin-tains 0 vinyl/Mylar flips 0 2X2's 2 Even though I wanted to do something different, the tried and true 2X2 and 20 coin page display in a three ring binder is a universal top choice for me!  |
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Pillar of the Community
United States
3499 Posts |
Hmm, yeah I was hoping that vinyl and PVC were not entirely the same beast, but it appears that they may be. Well, I have had some in vinyl flips for the past 6 months or so, but in a very low humidity and climate controlled room. So, I hope that there is minimal or no infection.
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Bedrock of the Community
Australia
21786 Posts |
Two reasons for NOT using PVC:
1.)Soft clear PVC has a plasticiser in itto make the material pliable. It very slowly gasses out of the plastic, and re condensed on your coin. Can be removed with acetone.
2.) Far more serious - the 'Chloride' in PVC is an oxidising agent, and will slowly darken your coins, converting the metal surface to chloride compounds. These cannot be removed with acetone. PVC has the capability of eventually turning copper, silver and their alloys black.
It can take anywhere from six months to ten years for PVC coin storage materials to have a deleterious effect on your coins.
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Valued Member
United States
227 Posts |
At first when I saw this thread I thought "wait what is the difference between vinyl and rigid PVC?".... apparently "vinyl" is just the short term that we use for a PVC plastic, whether it is a rigid one or a flexible one. So yeah stay away from them ... no reason to use them. Quote:
www.whatisvinyl.com: Many of you may have come across the terms vinyl siding, vinyl records, vinyl flooring, vinyl gloves etc, but may not know what exactly vinyl is.
Vinyl is not a natural substance but is a synthetic man-made material. It is a type of plastic that is made from ethylene (found in crude oil) and chlorine (found in regular salt). When processed, both the substances are combined to form Polyvinyl Chloride (PVC) resin, or as is commonly referred to - Vinyl. Edit: To add reference. Edited by donkrx
06/06/2012 04:54 am
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Bedrock of the Community
Australia
21786 Posts |
Plastic sewer pipes are often made out of rigid PVC, otherwise known as "uPVC".
There is no plasticiser in uPVC to soften it or otherwise make the material pliable. There is no plasticiser to leach or gas out of the material, and therefore remainds rigid.
Because uPVC pipe comes in relatively long continuous lengths, it's relatively smooth internal surface, and resistance to chemical and solvent attack, the material is highly suitable for sewer pipes. Hardly the properties for a coin flip!
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Bedrock of the Community
United States
20753 Posts |
Quote:
Plastic sewer pipes are often made out of rigid PVC, otherwise known as "uPVC". Also, in almost every hardware store by me they sell PVC piping for all household applications. In many homes it is used for the water systems. People can and do drink water from such sources all the time. It is used for underground water supply systems too. As to the plastic type flips, I suspect people are mixing up the ones being used by many dealers and those are not PVC. Those plastic flips are usually Mylar. A bit on the stiff side but have the advantage of adding a piece of paper to one side describing the coin on the other side. They do cost more than a cardboard type flip, some are a bit larger which makes them not good for those 20 pocket pages made for 2x2's. Normally they are stiff enough to not allow a coin to move at all. Yes if you shake it you can make the coin move but why do that anyway. I have a lot of those from purchases at coin shows but never use them myself. Normally I just give them away. |
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Bedrock of the Community
Australia
21786 Posts |
Insofar as coins, banknotes and stamps are concerned, Mylar is inert.
The colorant in hard white (or rigid) uPVC, is titanium dioxide (TiO2.
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Pillar of the Community
Australia
1006 Posts |
I think you should use mylar. if it works why change?
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Pillar of the Community
United States
1088 Posts |
2x2s are my choice for storage. Even with my odd shaped world coins, I just use a large size ( Ike dollar size) 2x2 flip. They give a very organized look to my collection and allow others to view them without hurting the collection. |
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Replies: 12 / Views: 2,563 |
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Posted 06/05/2012 11:51 pm
