So for printing an ID card, most image files are too small to see any better clarity in 600dpi over 300dpi 600dpi printing also takes longer to print each card and reduces the lifetime of the print head due to the increased workload So 300dpi is your best bet But you want a clearer photo on your id badges right? If you're doing mainly black & white or toned work, I'd suggest 600 dpi coz it really captures the clean lines/detail/clarity for that type of work I suggest dpi for color stuff Like someone else said in an above post it also depends on the power of your computer as well (processor, hard drive, RAM)We use those DPI targets (150 DPI minimum and 300 DPI maximum) to figure out our minimum and maximum file size recommendations for different sized Photographic Prints In the table below, the minimum recommended file size will make a Photographic that has 150 DPI and the maximum recommended file size will make a Photographic Print that is 300 DPI
How Can I Simulate A 300dpi Printout On A 600dpi Printer Graphic Design Stack Exchange
