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HP Designjet Z3100 Photo Printer Series - White spots on the print

White spots may be noticed on the print. This is probably due to paper fibers, dust, or loose coating material. Do the following to avoid this problem:
  • Try cleaning the paper manually with a brush before printing, to remove any loose fibers or particles.
  • Always keep the cover of the printer closed.
  • Protect the paper rolls and sheets by storing them in bags or boxes.