Our printer is able to print up to 1200 x 1200 dpi resolution.
However, even the trained human eye, can only tell so much difference up to 300-400 dpi – and therefore we regularly quote 300dpi as our standard artwork requirement.
Strict adherence to DPI also depends on the subject matter at hand
– text are strictly 300dpi or they will come out grainy or an “u” looking like an “a” and so on.
– for pure images with no high level of details, there is a bit of wiggle room