Suggestions For Storing Coins In Humid Climates?

ok I never knew that moisture could leak out the silica packs. reminds me I've got one of them at the bottom of my box of coins. going to have to take them all out now. Are ziplocks actually really air-tight once sealed or can air and moisture seep through the joints in the sides?

Sg93, you can buy large bags for storing blankets etc.
These have the air all sucked out by a vacuum cleaner.
Maybe you should invest in some of those.

http://www.starmaxonline.com.au/vac...ge-bags.html

Steve

It is a major cause because toning and most forms or corrosion are the result of oxidation-reduction reactions and those require water in some form to proceed. No water, no reaction.

If I had a better camera, I could show some of the damage I'm seeing from 70s-80s coins stored in hawaii conditions (80 degrees year round, 60-80% humidity.) the worst coins show staining from what appears to be condensation, while others show pinhole corrosion.

Im a newbie, but here's what I learned so far:
1. The only air tight container I've seen is plastic bags, eg the old blister packs from the mint. All other containers aren't air tight or will become compromised by changing temperatures as you've described.
2. Imho, probably the worst thing to do is keep them in a situation where the temperature varies widely. A temperature change leads to warping or condensation.
3. Keep them away from paper or cloth. Silver is ok in a cloth pouch like an old sock. Right now, I'm seeing if the modern coin-specialized plastic pages help.

My advice is to leave them in a cool, dark, dry place with a consistent temperature. Any extreme is bad, low or high. As long as the temperature is consistent, the high humidity shouldn't affect your coins.

probably not the best place for some of them but this is what I've been keeping them in until my collection grew too big. it's a pierre cardin box or something. does require a little push to get the lid down tight, lots of air vented out.



wonder what's in this treasure chest...


just the 10% of an (humble) iceberg. this box isn't as air-tight, but it'll do for now I suppose.


So this is how I store each and every one of them, 2x2's in ziplocks, air sucked out and folded over. I've yet to get a whole lot of LMC's out of the printing paper I wrapped so many coins into until a small lot of 2x2's arrived days ago. really needed them.

Any room for improvement so far? :D

I just put the coins in a month ago, maybe even less, so I suppose I should be watching closely then.

to be honest, I've not even given it any thought! perhaps in my abrupt start to the numismatic world not long ago i'd forgotten even about the old local money. Then again Singaporean coinage only started in 1967 and none of the issues save for the new one this year strikes me as beautiful. I'm glad about the redesign actually.

Thanks though, I might pop by some day and talk to them. I'm ashamed as a Singaporean who forgets about his own roots haha

including those in cloth bags? where I am, the most available form is a $2 , 6 individual cloth bags thing but they seem to absorb all they can in mere minutes. haha, thanks! sure won't forget that. just think more is always better. if it were that easy when it comes to procuring more rare and expensive coins... wishful thinking

yep, sure did, but it just dawned on me that I've a $1 usb vacuum cleaner that i'd totally forgotten about and instead sucked out the air manually before sealing the bags up. need to get the technique sorted out now though, since the nozzle on the vacuum isn't too well designed. Thanks for the helpful advice once again though, I hope such a topic hasn't been oft-repeated.