Mylar bag storage?

Does anyone store coins in mylar bags?

After my recent experience (here) I am working on a ways to store my collection in the high humidity environment I live in. For information sake this will all be in a top of the line fire type safe.

My thought is to use mylar bags to store coins/currency. Here is my idea:

1. Use 6in x 10in 5mm zip top mylar bags - These bags are PVC free & made from Mylar/PET/PE (which as far as I can find is coin safe, please correct me if I am wrong).
2. Insert 1 of these desiccant packs in each mylar bag.

Depending on how much I open each zip top mylar bag the desiccant packs will need to be replaced every so often. I will use some of these humidity cards as a control.

I will use various size mylar bags to accommodate things such as the 2x2 mylar flip pages, slabbed coins, air-tite pages, etc.

I made a couple up, here is a pic:



Any thoughts on this? Any things I should be aware of?

Thanks

 

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You must have some seriously high $ coins to want to go to all of that trouble and cost.

 

What was left over and what he was able to maybe save of his coin collection from his safe storage disaster. It was horrible.

 

I find zip locks to be adequate.......and they're reasonably priced.

 

Sorry, I didn't know about that. Was it posted here on CT?

 

Si

 

I think you may need to ditch the fire safe.

 

Ziplok bags are fine. You want things that are food storage safe.

 

And the chocolate coins stay fresh and tasty.....

 

No, not high dollar compared to what some people on here have I bet. Just high in sentimental value, things passed down from family that has passed on.

Yes, see link in second sentance.

I have ditched the original safe that caused the problem. Am purchasing a top of the line safe now, an AmSec BF3416.

These mylar bags are food grade.


I can see how this would get expensive if you had a large collection, but my collection is minimal at this point.

 

I looked at the link and remember that thread now. A heartbreaking disaster, for sure. Now I understand your concern for the most protection.

 

Someone who knows more than me - I thought all fire safes are poor storage environments for coin storage and not just the brand available wherever paper is sold. I also thought it was due to the materials used to make it a fire safe. Does anyone have any info?

 

Mylar with a desiccant may be perfectly suitable, but polypropylene bags would provide better protection from moisture. Polypropylene is much less permeable to gases and moisture than Mylar.

 

Thanks for clearing that up.

 

point?

 

Thanks I will look into the polypro bags as well.

Yes planned on having at least one of the large 750gm steel units in the safe as well.

 

Actually GDJMSP, do you know if the Cobalt Chloride in these products (in the "build in reactivation indicator") would cause problems?

The reason I chose the small packs linked in my post was specifically because they contain no cobalt chloride.