DPI
DPI (dots per inch) measures print resolution — how many ink dots the printer lays down per inch of paper, where higher DPI means finer detail.
DPI describes the physical printing resolution of a device. A consumer photo printer operates at around 1440 × 720 dpi. Fine-art printers (like the ones we use) print at 2880 × 1440 or 2400 × 1200 dpi, placing more ink dots per inch and producing smoother gradients and sharper detail.
DPI is distinct from PPI (pixels per inch), which describes the resolution of the source image. A print at 300 PPI on a 2880 dpi printer uses a 10:1 ratio of printer dots to image pixels, which is what lets smooth tonal gradations render without banding.
For wall art at standard viewing distances, images rendered at 300 PPI and printed at 2400+ dpi appear indistinguishable from the original digital file.
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