Author Topic: Intercept shield  (Read 10794 times)

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Offline mrslick32

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Intercept shield
« on: August 05, 2011, 12:31:52 AM »
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.

Underbidder

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Intercept shield
« Reply #1 on: August 05, 2011, 12:33:15 AM »
I personally think the Intercept Shields are effective in preventing the diminishing of the bank accounts of those who sell them.

Offline badon

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Intercept shield
« Reply #2 on: August 05, 2011, 12:50:58 AM »
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=Y

These 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=Y

These 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=Y

I 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-Bags

The 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_0

If you're doing a lot of slabs, this is a great investment:

http://www.amazon.com/gp/product/B001J4ZOAW

But, 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

Offline poconopenn

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Intercept shield
« Reply #3 on: August 05, 2011, 12:57:34 AM »
Yes, Intercept Shield products, using the technology developed by Bell Labs, will do the job to intercepts the corrosive gases in the air which can tarnish or corrode a valuable coin. However, I do believe that double sealed package is good enough.

Offline mrslick32

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Intercept shield
« Reply #4 on: August 05, 2011, 01:00:06 AM »
Thank you Badon and Poconopenn for your feedback. I really appreciate it.

Offline badon

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Intercept shield
« Reply #5 on: August 05, 2011, 01:09:23 AM »
It seems that poconopenn and I agree :)

Offline badon

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Re: Intercept shield
« Reply #6 on: August 05, 2011, 01:14:41 AM »

Underbidder

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Re: Intercept shield
« Reply #7 on: August 05, 2011, 01:21:34 AM »
The Interceptor Shields I have are not sealed- it seems air can get in them.  So then is it depending on the chemical inside, to continually attract and trap oxidizers in the air, without EVER getting depleted or worn out?  Please X'plane dat to my admittedly non PhD mind.
I think I'd sooner trust a vacuum sealed baggie.

Offline badon

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Re: Intercept shield
« Reply #8 on: August 05, 2011, 01:30:06 AM »
That was the exact same conclusion I came to. Even though in principle it may actually work, but if it isn't sealed, it'll "wear out" within a short time as the neutralizing chemicals are consumed, and eventually completely depleted.

Offline mrslick32

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Re: Intercept shield
« Reply #9 on: August 05, 2011, 01:44:48 AM »
I have a few Intercept Shield boxes and I asked the question before I buy more. Underbidder is correct that they are not airtight. However, based on what I read on their website and Poconopenn's feedback that the technology is sound, I think it will do its job. However, I think that it's best to do my own double sealing (or triple seal because my coins are slabbed) so I will also buy the archival safe polybags where I will put my slabs to double seal the coin. Then I will put the polybags on the Intercept Shield boxes since I need to store them anyway.

I couldn't have come to that conclusion if not for the feedback I received here so thank you everyone.  :001_smile: In case anyone is interested to know, I did some research for the polybags after reading Badon's feedback about Uline. I think it's a good brand but I thought it was quite expensive and I don't need 1,000 bags so I looked around and found GT Zip. I believe that they are the suppliers of the Ziplock brand bags sold in grocery stores and they have an archival safe product line called "Ultra Clear". The Ultra Clear bags are cheaper than Uline and you have an option to buy 100 pieces if you buy their "Lip and Tape" bags. I haven't made any purchase yet since I'm still looking around but I thought about sharing it with all of you in case anyone is interested.

Here's the link to the Lip and Tape bags:
http://www.gtzip.com/polypro/lipandtape.html

They also have the regular 2 Mil poly bags:
http://www.gtzip.com/ziplock/ucplain2mil.html

This is their explanation for the different types of poly bags:
http://www.gtzip.com/archival.html

Underbidder

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Re: Intercept shield
« Reply #10 on: August 05, 2011, 01:45:32 AM »
Yeah, so back to your baggie. And a quick kiss to the corner to suck the air out-- :tongue_smilie:

Offline badon

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Re: Intercept shield
« Reply #11 on: August 05, 2011, 01:58:24 AM »
Don't get the lip and tape bags. They aren't at all sealed, and they tend to leave sticky goo on your slab when you take it out or put it in.

The ultra clear bags do look to be about half the price of the uline though, thanks for the link. I might buy some to see if they are as good as the uline.

Offline mrslick32

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Re: Intercept shield
« Reply #12 on: August 05, 2011, 02:05:09 AM »
Thanks for the feedback regarding the Lip and Tape bags.

Offline comeaux

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Re: Intercept shield
« Reply #13 on: August 06, 2011, 03:58:16 PM »
Hi badon ... for long term storage i have my slabs stored in NGC boxes which are in bank safety deposit boxes, should I take the slabs out of these NGC boxes and put the slabs in these bags you referenced for safer lomgterm (years) storage.
thanks in advance !

Offline poconopenn

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Re: Intercept shield
« Reply #14 on: August 06, 2011, 05:57:03 PM »
The intercept shield products are made with flexible plastic impregnated with copper in the atom state which can neutralizes the sulfur gases before these gases can react with coins. The toning is caused by reaction between sulfur gases and silver and copper atom on the surface of the coin. The intercept shield, according to study conduct by Weimar White, a well-known numismatist and specilized in coin chemistry,  should be good for five years.

For bags mentioned by Badon, I will storngly recommend that a freshly minted copper penny be placed inside the bag to give extra protection. The copper penny should be replaced when it shows sign of toning.

Bank safety deposit box is a perfect place to store coins. Usually, it is enviromental control and should be good enough without extra protection. This is the place I store my valuable coins.    
« Last Edit: August 06, 2011, 06:06:16 PM by poconopenn »