John,
My leaf is kilned within 1 quart Zip lock bags (left open). When they come out, they are moist and warm. Even if immediately sealed, by the following morning they tend to be much too dry to safely handle. I keep these "over-sized wallet" sized books of leaf in their closed Zip locks near where I make my coffee each morning (hot water poured into a filter cone). When my tea kettle starts to whistle, I open the Zip locks, one by one, and hold them over the jet of steam for a bit, then re-seal. Sometimes it takes a single steaming to bring the leaf into case. Those "wallets" that are closer to an inch thick may require daily steaming for a week to get there. I try to have the book of leaf feel like Morocco leather (medium case) when I'm done.
I just take my time, and wait for them to be ready for use. Since the flavor and aroma of kilned leaf needs to stabilize out of the kiln for at least a week, I don't regard the delay as an issue. There is some bitter constituent--that I haven't identified--that seems to accumulate within the leaf during the kilning process, and which dissipates during the week of rest--even with the bag closed. I'm always surprised with how much better the leaf is after resting.
Bob
