No minimum on shirts, no Maximum on colors! The decision ultimately comes down to the design and the quantity of shirts you need. Less than the minimum quantity shirts and max colors for screen printing will usually be require DTG to be used. Screen printing and DTG both yield comparable, quality prints, but they differ in method. For one, screen printing is one of the oldest techniques, while DTG is newer technology. Screen printing involves pushing ink onto fabric, while DTG uses a printer to print ink directly onto a garment.