# Print Quality Problems

White lines (Colored lines) / Banding

• White lines, colored lines, or banding run horizontal to the paper feed direction in printouts.
• White lines at irregular intervals or at regular intervals (10 mm).
  

Dark lines/Banding

• Dark lines run horizontal to the paper feed direction in printouts.
• Dark lines at irregular intervals or at regular intervals (10 mm).
  

Ruled line misalignment or Character distortion

• Ruled lines printed in the Y direction of paper look skewed or not aligned.
• Characters are distorted.
  

Diagonal Unevenness

• Diagonal shading occurs in the Y direction of the paper.
• The location of occurrence differs for each factor.
  

Ink smear 1 (smear on printed side)

• Dirt has occurred only on the printing surface during single-sided printing.
  

Ink smear 2 (smear on back side)

• When printing on single-side of paper, only the back side (opposite the printing side) is stained.
  

Ink Smear 3 (roller mark smudges made by serrated roller and paper feed roller)

• Solid or dotted lines appear at regular intervals in printouts.
  

Incorrect Colors

• Color shift has occurred in part or the whole of the image.
  

Cockling

• Streaks and ruled line shifts have occurred due to the waving of the paper.
• The waving direction differs depending on the paper.
  

Incorrect print position

• The print position is shifted from the center of the paper with respect to the transport direction or the Y direction.
  

Wrinkling of paper

• The output paper has wrinkles (creases).
  

Blank pages print

• Blank printing has occurred for each head chip width.
  Minimum 10mm ~ (10mm unit)
  

Entirely too dark printout

• A solid image is printed in units of the head chip width.
  Minimum 10mm ~ (10mm unit)
  

Ripple pattern

• A ripple pattern has occurred.
  

Damage of Paper

• The front edge of the paper is scratched.
  

Ink Dry Failure

• Ink is not dry enough and gets dirty when touching paper.
  

Strike-through

• When printing on both sides, the printing result on the front side is seen through.
  (Revers side)
  

Faint Printout

• Light color in head chip width units. Or different colors.
  Minimum 10mm ~ (10mm unit)