Epson Stylus color 860 Setup Manual page 11

Note:
Do not remove the small sponges attached to the ink cartridge clamps.
4. Open the ink cartridge packages. Next, remove only the yellow tape
seals from each cartridge.
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Caution:
You must remove the yellow tape seals from the cartridges before
installing them; otherwise, a fatal error will occur and the
cartridges will become unusable.
Do not remove the blue portion of the tape seals from the cartridges;
otherwise, the cartridges may become clogged and unable to print.
Do not remove the tape seals from the bottom of the cartridges;
otherwise, ink will leak.
5. Place the cartridges gently into their holders with the labels facing up.
The color ink cartridge, which is larger, goes on the right and the black
ink cartridge goes on the left. Do not press down on the cartridges.
Note:
Install both ink cartridges. If either of the cartridges is not installed, the printer
will not work.
6. Press the ink cartridge clamps down until they lock in place.
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Caution:
Once you install the ink cartridges, do not open their clamps again until
you replace the ink cartridges; otherwise, the cartridges may become
unusable.