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<p>[QUOTE=&quot;rggoodie, post: 54300, member: 1853&quot;]<b>Self adhesive 2x2s +*+*</b></p><p><br /></p><p>I collect Australian Coins and there has been much discussion on the Australian forum about self adhesive 2x2s.</p><p><br /></p><p>Like everything else it has to do with Quality. The cheap ones have caused some toning. The more expensive ones seem to do very well and you do not have air or staple rust affecting your coins.</p><p><br /></p><p>I am posting some information that I have cut from the Australian forum and my thanks to Niksfree for the post</p><p><br /></p><p>&nbsp;Hi my understanding of the self adhesive coin holders is that the glues become inert when bonded together, toning would be from holders made before the introduction of mylar and when stored were not in a cool environment. Using the stapled ones exposes the coin to stains from corrosion of the staples which are not made to a standard but a price and will deteriate when moisture is present in the air. NOTE When using the self adhesive coin holder its important also to allow the adhesive to activate when the protective label is peeled off by allowing it to stand for a few minutes before squeezing together the two halves. by using a holder that is as close in size to the coin also helps as no air which may have moisture in it, to be trapped with the coin, this is a problem in humid regions and will cause toning. to help eliminate this problem further try and seal your coins in an air conditioned environment after allowing them to sit for an hour to stabilise in the room along with the holders. Hope this will help those experiencing problems with the coin holders.[/QUOTE]</p><p><br /></p>

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