I use this often to label boxes at work.  I don't know if it's my machine or the tape, but the ink doesn't smear & lasts long.  They stay on well & on plastic, it often will come off easily if I need to remove it.  They are not waterproof, but they aren't advertised to be waterproof...just an FYI.  But most people don't need around water.  But I need to rinse them on occasion.  They will go through a few rinses before I need to replace them.  I'm glad I found these.