Continue to use your refill kits with extra bulk ink. When purchasing bulk ink, you must be sure you are getting the correct bulk ink for the type of cartridge that you want to use the bulk ink in. Different cartridges use different types of ink. For example, HP cartridges 51626A, 51629A, 51640A and 51633A are all HP black cartridges, but they all use different black inks in each one. You must be sure to purchase the correct bulk ink for the correct cartridge or you could damage the cartridge and/or the printer. If you do not see your cartridge listed, email sales33@cartridgehq.com and I will check on the availability of bulk ink for your cartridge. I do not have a universal ink and I do not even know how a universal ink could work in all cartridges. I, personally, would not recommend using a universal ink.

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