Jim:
You wrote in reply to a recent e-mail from “Billfour” [1]: “JWR Replies: That is a great suggestion. Just beware of any desiccant that has any additives, dyes, or scents. A perfumed desiccant would be fine for tool storage, but potentially a disaster for food storage.”
I’ve just been through this. Tidy Cats Crystals has perfume, which I discovered after getting it home and opening it. (I’ll use it for my stored ammo.) The brand that I have found that has no perfume is the Amazing Cat Litter brand [2]. It only has silica gel as the stated ingredient on its Material Safety Data Sheet (MSDS). Also, the chunks of silica gel are larger, with much less dust. I used twist-ties and brown coffee filters to wrap-up an ounce at a time, which is the approximate amount needed for six-gallon pails. – Ham