Karma Scissors, zHelms, FM?

When it contacts another player, meaning storage works. It removes the tradability completly untill it recontacts another player.

Just to make sure about the bolded part:

If you put your karma'd item in your shop, and then the shop expires/closes and it returns to your inventory, does it become untradeable again? Or does the system remember you're the original owner and not turn that flag on again?

Is there a difference, in this regard, between regular shop permits (that work off your own inventory) and hired merchants (that have a separate inventory)?