Thanks for all the info. I had 10 mins spare this morning so took one of the carts apart WOW what a lot of ink left the whole bag weighed in at 35g .
Now the question is what do I do with it ?? I'm sure you will have ideas on that.
Put it in a refillable cartridge and use it (if it is not too old).
Some people buy used cartridges (just the larger sizes) on eBay just to extract the remaining ink. I would imagine that some of the ink bought on eBay might be fairly old though. Same thing happens with new cartridges -- extracting the ink of new large cartridges to refill smaller cartridges because the cost per ml is so much cheaper.
So lets see, maybe 25 extractable ml of ink ink per cartridge times 200 cartridges times the price per ml of 80 ml cartridges is about $3500. But then there is the time involved.