Laser Exposure Print
A chromogenic print exposed by red, green and blue lasers or LEDs scanning across photographic paper under digital control.
Measured in
ppi
In depth
These machines expose at a fixed native resolution, typically 200 or 305 ppi, so files should be supplied at exactly that figure to avoid the machine resampling them. The output is a real photographic print, processed in standard chemistry, which is why its permanence follows the paper's rating rather than any ink specification.
Examples in practice
A lab specifies files at exactly 305 ppi so its laser printer exposes them without any interpolation.