TR7520 printer ink tank no being used

[LarsMacD]

TR7520 printer seems to work fine, except the black Tanks are not fully utilized. Printer uses large tank (280 PGBK) until that runs dry, and never uses the BK 280 tank. 

I am sure that I am missing something simple, but, ... 

Advice? 

[ArthurJ · Accepted solution]

Hi,

There are two kinds of black ink in the machine: dye ink (BK) and pigment ink (PGBK). The dye ink is used mainly for printing photos, illustration, etc., and the pigment ink is used for text-based documents. Each has different purposes so that even if one runs out, another will not be used instead.

So if you are printing text based documents more than anything else, the BK in will not be used as much as the PGBK. 

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[LarsMacD]

Thank you for the explanation. That clears up my confusion.