When my order comes in, I have each sack roasted. The workers pour the chilies into a cylinder, and spin it quickly as a flame roasts the chilies to perfection.
Here's what the look like when they're done. I wish the picture was a scratch and sniff. They smell HEAVENLY! Next, they pour them into a plastic sack, and seal them for the trip home.
By the time I take them home, they've been sitting in the bag for a while. They have steamed a little in the hot, moist bag and it helps the peels to loosen.