BigDuck, take a look at some of the basic materials that the printer allows you to produce. One way to check (before printer is built) is go to the manufacturing screen and change default to "facility missing" and middle mouse button click the items listed to see if they need the printer (listed under services required) and what input items if any are required. You won't know the labor hours or the cost until the printer is built. You might see some basic items that require other facilities you haven't built yet. These might turn out to be profitable too, or in some cases very profitable (compared to grog) once you build those facilities.
I'm not giving exact answer to make a particular item for profit to avoid spoilers and also because I'm not up to the latest version and what is profitable in my game may have been nerfed (or unprofitable buffed) in the newer versions
