Main classification: Plane

Definition: Images and text missing from the whole sheet.

Sub-classification 2	Example	Definition
All black		Copied paper is all black.
Blank		No image is reproduced.

Definition: Parts of the developed images and text are not reproduced.

Sub-classification 2	Example	Definition
White zone		Part of a solid image or halftone is missing.
Wormholes		The outline of a letter (or a line) is reproduced but the inside of it is missing.
Halo		There is a white line around a solid object.
Negative residual image		The previously copied image is reproduced with its black and white reversed on the same page or the next page.
Positive residual image		The previously copied image is reproduced on the same page or the next page.
Offset		The same image is repeatedly transferred at the same interval.
Missing image		The developed image has slid in the subscan direction or is missing.

Definition: The density of the developed image is uneven.

Sub-classification 2	Example	Definition
High density		Image density higher than the setting.
Low density		Image density lower than the setting.
Uneven density		Image density is uneven within the same page.
Unevenness in indefinite shape		Image density unevenness in indefinite shapes.
Uneven glossiness		The glossiness is uneven inside a dark solid image. Check it by looking at the paper from different angles.
Color changes		During repeated printing, the color or the density changes from sheet to sheet.
Color difference		The colors differ between the original and the copy.
Rough image		Color is uneven and small spots are visible inside a solid image.
Earthworm shape		White area in a shape similar to an earthworm.
Moire		When regular patterns are superimposed, a striped interference pattern can appear. Halftones may become mosaics.
Blur		Image seemingly blurred in all directions.

Definition: Areas outside letters or images are stained.

Sub-classification 2	Example	Definition
Background stains		Granular stains are visible in unprinted areas of the paper.
Stains on the back side		Granular stains are visible on the back side of the paper.
Toner scattered		Toner scattered around a letter.
Edge stains		The side edges of paper are stained.

Definition: Images or text becoming irregular in comparison with the original.

Sub-classification 2	Example	Definition
Irregularity		Image becoming irregular in comparison with the original.
Image expansion		Image expanded abnormally in comparison with the original.
Image contraction		Image contracted abnormally in comparison with the original.
Skew		The corners of an image copied from a rectanglular original are not square.

Definition: Stains in the shape of vertical streaks which seem to be caused by scratches from the guide plate ribs or other parts.

Sub-classification 2	Example	Definition
Claw marks		Stains of toner that got on the paper when it came into contact with drum pick-off pawls or fusing iunit stripper pawls.

Definition: Stains in the shape of vertical streaks which seem to be caused by scratches from the guide plate ribs or other parts.

Sub-classification 2	Example	Definition
Vertical image shift		Images and lines shifted in the paper feed direction.
Horizontal image shift		Images and lines shifted in the direction perpendicular to the paper feed direction.
Vertical color registration error		Color out of position in the paper feed direction where colors should be overlaid.
Horizontal color registration error		Color out of position perpendicular to the paper feed direction where colors should be overlaid.