Originally Posted by homebrewer_99
All else said...it would save you a lot of ink if they were printed on black stock.
I know that 33cl is basically a 3rd of a liter...I lived in Germany for 9 years.
Most home printers do not print white, and the ink used allows the color of the paper stock to show through, so printing on black stock will not work. For that to work, he would need to silk screen the design onto black stock, using a thick enough ink that it acted more like a paint, not an ink. A basic silk screening kit can be found at most hobby/craft shops for fairly cheap, so that might be one direction that he wants to look, depending on how much time and effort he wants to put into these.