"Printer Secret"?

I saw it on Facebook and wondered if it was just a Facebook profile gathering scam.
Thanks.
Pete
 
It has been known for years. The calibration is made so you will not run out of ink on a large print.

The problem is does it actually measure ink remaining or does it keep tract of usage electronically.

You need to test it out to see exactly how your machine works. Maybe you can refill from another partially used cart and see what happens.
 
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