This is all purpose line flush and cleaner. This water based solution works with bulk cartridges. Use it to flush the ink lines when doing ink conversions or if you have a head clog this solution will help loosen the ink. You can also use this solution as an inexpensive ink substitute in the color channels when setting up your printer using our black / clear solution for film output.
I have been using Filmdirect for 3 years. I love the system. I'm not sure what this solution is, but it keeps my printer running. It's just part of the deal to have the best ink system out there.