Epson XP-610 User Manual page 211

5. Recap the used ink cartridge using the cap that came with it.
Note: Dispose of used cartridges carefully. Do not take the used cartridge apart or try to refill it.
6. If you are replacing the Black (BK) ink cartridge, it is recommended that you shake the new cartridge
gently four or five times before unwrapping it. You do not need to shake the Photo Black (PBK)
cartridge or any of the other color ink cartridges.
Caution: Do not shake the cartridges after opening the packages, or ink may leak.
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