We need to develop a method of putting solder paste on a stencil then putting the unused part back into the re-frig. Reason we are thinking of this method is because we only run circuit boards twice a week. I don't want to waste entire jar of paste because we have 14 days once open. Can I do this or do I need to contact my solder manufacturer and see if they are willing to take my jar of solder paste and make it into smaller portions. Is there something I can do if my paste manufacturer is unwilling to make smaller portions. Any and all comments are welcome.