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<p>[QUOTE=&quot;Clawcoins, post: 3354200, member: 77814&quot;]I&#039;m not a chemical expert like some on this board are. Just an Economist.&nbsp; lol</p><p>So some of this is my opinion.</p><p><br /></p><p>1 - I wouldn&#039;t think so.&nbsp; I have the silica packets with antitarnishing strips and have never had a problem.</p><p><br /></p><p>2- depends how large a container, how often you open it, etc.</p><p>Think of it this way.&nbsp; When you close a container of any type you are closing in the ambient air.&nbsp; Thus the humidity, pollutants, etc that are in the air at that time.&nbsp; So if you close a container on a really humid day, that one packet may work hard and be done in a day (just giving an example).&nbsp; So you can look through the container and see it has changed colors.&nbsp; What do you do? open it up again exposing everything to the elements again to swap it out and start over?&nbsp; Or just wait until you open it later on to look at stuff and then change it ?</p><p><br /></p><p>I put in recharged packets every couple months on a nice dry day.&nbsp; Dry for low humidity.&nbsp; My house&#039;s humidity is also normally balanced to minimize dust and for specific woods I have stored.&nbsp; My safe is also water tight (even through the lock hole) .. so it has a anti humidity device in it too.&nbsp; Though most of my good stuff is in a SDB.</p><p><br /></p><p>The 3M thing I think I change out once a year which is only in my higher qualtiy silver stuff.&nbsp; For instance my new Apollo stuff will get everything for protection.&nbsp; That link above has questions related to that 3M strip.</p><p><br /></p><p>For my glass jar stuff, it&#039;s all bulk coins so I don&#039;t put in a 3M/silica packet.&nbsp; It&#039;s only for bulk as I find it difficult with my older hands to deal with them for my better coins.&nbsp; The Tupperware type things are easy in-out containers.&nbsp; And after all, the glass jar&#039;s lid is metal and the seal is rubber/plastic (there are the older rubber seals and the newer flat lid seals, which seal when the contents cool and suck it down to create a seal, which isn&#039;t happening in the case of coins.&nbsp; Though the rest of it is glass.&nbsp; I don&#039;t even use the seal anymore and use it like a regular glass jar which most of my newer ones are just emptied jelly jars, such as this: <a href="https://www.cointalk.com/threads/1965-1998-clad-quarters-share-us-your-collection-and-why.317630/page-35#post-3248523" class="internalLink ProxyLink" data-proxy-href="https://www.cointalk.com/threads/1965-1998-clad-quarters-share-us-your-collection-and-why.317630/page-35#post-3248523">https://www.cointalk.com/threads/1965-1998-clad-quarters-share-us-your-collection-and-why.317630/page-35#post-3248523</a></p><p><br /></p><p>FYI on the ball glass jars I used the ones that taper up like a glass. They&#039;re easier stackable and easier to pour the contents out if you go that route.</p><p><br /></p><p>3 - I&#039;m not sure the specific one you are asking about but I use one for one of my silver instruments. They clean off tarnish and the newer ones also wipe on an antitarnish sealing agent or something like that.&nbsp; Nothing like the 3M strip does.&nbsp; They are for different purposes of cleaning up your silver teapots and stuff.</p><p><br /></p><p>I don&#039;t live anywhere near the coasts so my opinion is fairly muted to your situation.&nbsp; I do live near Detroit which has a facility that spews out sulphur junk, and there&#039;s a small local asphalt production site which stinks sulphur as well. Though I&#039;ve had no tarnishing problems.[/QUOTE]</p><p><br /></p>

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