Badon and Poconopenn, I have a question for both of you since you both have backgrounds in Chemistry. What do you think of the Intercept Shield products? Do you think they are effective in helping prevent the tarnishing and spotting of coins? Thanks for sharing your expertise with everyone.
I took a look at their website, and although the principle is sound, the way they're using it doesn't seem like it would work for very long. I could not find any details of how they claim that it's supposed to work, so I dismissed it as a sham.
But, it might not be - it depends on how well it seals. Either way, I think you can do the same thing much cheaper by just using cheap uline bags.
These are the ones I use for normal sized slabs:
http://www.uline.com/Product/Detail/S-11579/High-Clarity-Polypropylene-Bags/3-x-4-2-Mil-Reclosable-Polypropylene-Bags?FromOrderHistory=YThese are the ones I use for large size slabs, like for the god of longevity, war & wealth, 5 oz coins, etc:
http://www.uline.com/Product/Detail/S-10644/High-Clarity-Polypropylene-Bags/7-x-9-2-Mil-Reclosable-Polypropylene-Bags?FromOrderHistory=YThese fit nicely over most coin capsules:
http://www.uline.com/Product/Detail/S-13263/High-Clarity-Polypropylene-Bags/2-x-3-2-Mil-Reclosable-Polypropylene-Bags?FromOrderHistory=YI use these cheaper versions for temporary sealing when shipping coins to NGC, or if I want to double (or triple!) seal a coin:
http://www.uline.com/BL_208/2-Mil-Reclosable-BagsThe high clarity polypropylene bags are ESSENTIAL for storage, display, and enjoyment of your slabbed coins. They keep fingerprints, dust, dirt, and scratches off of your coins. I never worry when I hand a coin to someone, and I'm not sure if they've still got some lunch on their hands :)
However, you have to make sure you blast the dust off of the slabs before you put them in the bags. If you don't, the dust will scuff them up inside the bags.
To blast the dust off, you'll need this if you have strong hands, but don't want to spend much:
http://www.amazon.com/Giottos-AA1900-Rocket-Blaster-Large/dp/B00017LSPI/ref=pd_cp_p_0If you're doing a lot of slabs, this is a great investment:
http://www.amazon.com/gp/product/B001J4ZOAWBut, it's loud enough that it WILL damage your hearing after a few uses, guaranteed, so get some earplugs:
http://www.amazon.com/gp/product/B001EPQ3H4