The main part of the idea is to allow a PDF file ( a template) to be customized based on some data received. More details here: https://news.ycombinator.com/item?id=5601127

Our MVP won't go up to manage the physical printing but would be coming in the second phases (unless it become a hard requirements for phase 1).

To explicitly answer, you would be able to print on whatever you want as you would, at the beginning, not handle the relation with the printer.