Never heard of drying buds like that. Curing maybe, but you don't want to wrap any buds up tightly so there is no air for them. That is a recipe for mold.

Just leave you buds out for 5-7 days, and they should be dry. Some hang them, some just put them on something, and turn them every 12hrs for even drying, or some lay them on a screen to dry. There are many methods, but one thing you don't want to do is cram them in something so there is no air. Mold is made from darkness and moisture, which is exaclty what you did.

I hang mine for about 5-7days, or until they are crisp to the touch. Then I move them into curing jars, and for the first 4 or 5 days, I open them jars up for 30min every 12hrs, so mold doesn't form. I usually cure for about 2-4 weeks.