In my main storage space for a good bulk of my coins I've been using my cat's CLEAN litter. I use small canvas bags 4''x 6'' (available at some craft stores) filled with the litter and placed about 5 bags in storage area . I started this about 2 years ago , so far so good . It's sort of '' THE CATS MEOW '' !
I actually doubt it works - certainly not as well as silica. The amount of atmospheric moisture absorbed by cat litter is pretty small or nobody could keep cats in damp climates.
-----Burton
50+ year / Life / Emeritus ANA member (joined 12/1/1973)
Life member: Numismatics International, CONECA
Member: TNA, FtWCC, NETCC, EveryCountry (online) coin club
Owned by three cats and a wife of 40+ years (joined 1983)
We call this stuff "Kitty Litter" here in Aus and this stuff is super versatile and has a hundred and one uses. I think that it would work just fine, It is Far better than nothing and is super cheap as well.
Just make sure that the bags that contain the kitty litter don't break or leak. The dried, purified clay of which some litter materials are made, happen to be very abrasive.
OT. If you live in snowy or icy climates, you might want to keep some in your auto. It is abrasive enough to give traction to tires on ice, and won't rust out the auto if the bag leaks.
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