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<p>[QUOTE="dannic113, post: 1409031, member: 35203"]Actually that quote is only part right. Here is the total break down. 1) vinyl IS PVC HOWEVER... 2) non plasticizer is safer that the alternative but only somewhat safe it can still do some damage to coins (most say never use these for proof coins as it causes hazing and hairlines) by being rigid they can scratch coins even MS coins and when exposed to actual moisture/water and high desert (120 degrees F.) heat they can begin to soften and breaking down. Now most won't store their coins in this manner but floods and things do happen. 3) most cardboard 2X2 flips now a days are made with polyester (PET) or mylar (BoPET). Again both are the same only diffence is the poly is just a clear safe film plain and simple. Mylar in addition to being trademarked by the DuPont Company is polyester film that had been biaxially oriented or tempered and stretched and can then be doubled over itself to give thicker protective film yet still be able to see through it. It is also a bit more protective from sunlight and heat than anything else. The absolute best thing to store coins in is #5 plastic polypropylene as these plastics take something like a century to even start to break down (even then they don't emit gases or chemicals that would harm coins), are impervious to water (execpt at any seams hense why airtites aren't waterproof), sunlight, heat lower than 200 degrees F., some airtites also use a coin safe plastic called triacetate. NGC/PCGS type holders and capital plastics holders are made from lucite brand acrylic plastic also totally safe but again not completely air or water proof.</p><p><br /></p><p>As for questions about which flips are low plasticizer pvc the only ones that I know of are International plastics of california, frame-a-coin or madison flips from new jersey (they will usually say #28UN for unplasticized) and Kointain's Saflips. Guardhouse and Cowens brands pay dupont to use mylar polyester, SuperSafe Saf-T-Flips use polyester. Any others you have to research who makes them and with what.</p><p>As for personaly use I use the frame a coin flips from madison, new jersey ONLY to store coins for a week TOPS. I use them to house coins that people purchase or when I need to ship or transport coins say to or from a dealer or to someone else. They are thicker and more protective from a transit standpoint. As for cardboard flips I use guardhouse only because they usually cheaper than cowens or supersafe ones. Airtites I use acrylic only and never any direct fit ones as they let in too much air around the seams again only as personal choice. All albums and even the airtites and PCGS/NGC acrylic slabs are put in plastic cases and then are stored in plastic storage bins using polypropylene #5 with desiccants for summer humidity.[/QUOTE]</p><p><br /></p>
[QUOTE="dannic113, post: 1409031, member: 35203"]Actually that quote is only part right. Here is the total break down. 1) vinyl IS PVC HOWEVER... 2) non plasticizer is safer that the alternative but only somewhat safe it can still do some damage to coins (most say never use these for proof coins as it causes hazing and hairlines) by being rigid they can scratch coins even MS coins and when exposed to actual moisture/water and high desert (120 degrees F.) heat they can begin to soften and breaking down. Now most won't store their coins in this manner but floods and things do happen. 3) most cardboard 2X2 flips now a days are made with polyester (PET) or mylar (BoPET). Again both are the same only diffence is the poly is just a clear safe film plain and simple. Mylar in addition to being trademarked by the DuPont Company is polyester film that had been biaxially oriented or tempered and stretched and can then be doubled over itself to give thicker protective film yet still be able to see through it. It is also a bit more protective from sunlight and heat than anything else. The absolute best thing to store coins in is #5 plastic polypropylene as these plastics take something like a century to even start to break down (even then they don't emit gases or chemicals that would harm coins), are impervious to water (execpt at any seams hense why airtites aren't waterproof), sunlight, heat lower than 200 degrees F., some airtites also use a coin safe plastic called triacetate. NGC/PCGS type holders and capital plastics holders are made from lucite brand acrylic plastic also totally safe but again not completely air or water proof. As for questions about which flips are low plasticizer pvc the only ones that I know of are International plastics of california, frame-a-coin or madison flips from new jersey (they will usually say #28UN for unplasticized) and Kointain's Saflips. Guardhouse and Cowens brands pay dupont to use mylar polyester, SuperSafe Saf-T-Flips use polyester. Any others you have to research who makes them and with what. As for personaly use I use the frame a coin flips from madison, new jersey ONLY to store coins for a week TOPS. I use them to house coins that people purchase or when I need to ship or transport coins say to or from a dealer or to someone else. They are thicker and more protective from a transit standpoint. As for cardboard flips I use guardhouse only because they usually cheaper than cowens or supersafe ones. Airtites I use acrylic only and never any direct fit ones as they let in too much air around the seams again only as personal choice. All albums and even the airtites and PCGS/NGC acrylic slabs are put in plastic cases and then are stored in plastic storage bins using polypropylene #5 with desiccants for summer humidity.[/QUOTE]
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