HP 56 and 57 cartridges

[Dave C.]

After filling these carts, is it necessary to cover the holes with tape?
New carts have a label over the holes without any venting. Some suppliers
of ink say covering them with scotch tape is not necessary, others say to
cover them with tape, others say be sure to punch a pin hole for venting.
--
Dave C.

(e-mail address removed)9et

Remove the five 9's (leave the 4) for email.

 

[Steve B]

I reuse the same label, so far I've used 3 labels about 8 or 9 times, but they
are beginning to lose their stickiness. There is venting via the narrow grooves
under the label, which is why I prefer to keep a label in place after a refill,
and I'm careful to align it properly to restore the same venting. A lot of
refill ink suppliers say that the label can be left off though, but it doesn't
seem right to me, and must make the ink more prone to drying out in the sponge.

 

[Guest]

The holes vent from under the label through molded channels. They can be
left
safely uncovered. The labels are designed to hide the availability of fill
ports
for the cartridges, while still allowing the cartridge maintain ambient
pressure.

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