This is a repeat order. The black is slightly gray looking closely and was not waterproof at the old batch. I prefer using a 5ml syringe color on the needle directly from the barrel. 5ml 21 can be filled slowly with no mess in the cartridge HP. That goes without black fingers. Nevertheless, I wear disposable gloves and put a newspaper. To close the cartridge I use Tesa. Then I rinse the syringe and needle with water thoroughly. Without the addition worried syringe (useful blunt needles attached) is the work of a mess. The result is cheaper and easier than with refill Part Ronen, if you re-fill the cartridge immediately upon failure. Even after four-time fill any problems. Effective way possible! No money - I'm sorry HP ;-)
