SAFLIPs are superior to soft polyethylene bags or other flimsy storage methods because they are thicker and more rigid, offering better physical protection. The spotting is often delayed and can even show up later on previously graded encapsulated coins. To the coins surface, causing black spots to form. Most notorious is the presence of paper or cardboard dust, which can easily transfer These contaminants have been known to cause spotting or tarnish over time. It is well known that dust or oil can be transferred from a storage product to its contents.
#Mylar coin flip free
Both the product and its packaging is free of contamination which might adversely affect the materials to be stored in SAFLIPS. The manufacturing process for SAFLIPS is a unique one in that cleanliness is maintained rigorously. SAFLIP’s are made of the type of PET plastic that permits them to be easily sealed with common impulse type heat sealers (See list at end for institutions using SAFLIPs.) PET has a high tensile strength - it is very difficult to stretch. For this reason, PET is used by museums for artifact storage, such as the Library of Congress and the Smithsonian Institution. PET also affords protection from ultraviolet radiation, which can cause metals to tarnish. In addition, PET allows little gas exchange through itself, so an object sealed between two sheets of PET plastic will see little exchange with the air surrounding it. Therefore, it is ideal for any type of storage where it is desirable to have a packaging material which will not attack the contents of the package. PET is a very stable, inert and dense plastic. in 1980 and were the first double pocket MYLAR coin flips. SAFLIPs were developed by E&T Kointainer Co. The most common tradename is MYLAR ® a registered trademark of DuPont. This plastic, derived from polyethylene, is commonly called "polyester" and is manufactured and sold under several tradenames.
SAFLIP flips are made of inert, archival quality plastic: polyethylene terephthalate (PET). SAFLIPs can be heat sealed across the top of the pocket to make an airtight holder. SAFLIPs are available in 2x2 and 2 ½ x 2 ½ inch sizes and are 5 mil thick.
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