fresh harvested buds usually don't need pack.let them moisten the jar with the water they have inside.remove the top for some time each day,depending on how moist they are inside,let the moisture go away,close the jar.this is curing.
When they get drier than you wanted them to be,you can put in the pack.
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remove the pack when humidity inside reaches the desired level.it kills the aroma when it overstays in the jar