Why do photos printed with the Xiaomi Portable Photo Printer Pro have horizontal lines?

The Xiaomi Portable Photo Printer Pro can produce horizontal lines on prints for the following reasons:
  1. Cutting line: When the photo paper moves forward, it passes over the cutting line. If the cutting line is not perfectly smooth, it can cause a faint horizontal line to appear on the print. This is a normal phenomenon and is common among portable photo printers that use cutting lines;
  2. Full-page horizontal lines: The 3-inch portable dye-sublimation photo printer is designed to be compact and lightweight. Due to paper feeding fluctuations and varying photo content, slight horizontal lines of different shades can appear on prints from home dye-sublimation printers. This is normal and common for most portable photo printers. When not viewed closely, these lines can mostly be ignored.

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