Epson Stylus Pro 7600 Reference Manual page 198

Warning:
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If ink gets on your hands, wash them thoroughly with soap
and water. If ink gets into your eyes, flush them immediately
with water.
5. Make sure the replacement ink cartridge is the correct color,
and remove it from the package.
Caution:
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Do not shake cartridges that have been installed previously.
Doing so may cause ink to leak out.
Note:
❏ If you are using EPSON UltraChrome type ink cartridges,
shake the ink cartridge gently before installing it for best results.
❏ There is a protection system against improper cartridge
insertion. If you cannot insert the ink cartridge smoothly, the
type of cartridge may be incorrect. Check the package and
production code.
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