Sub-classification 1: Spots

Definition: White spots seen in solid image areas or black/colored spots seen where there should be nothing printed. The description "white spots" excludes those with toner cores.

Sub-classification 2

Example

Definition

Black or colored spots

Stains are visible as crisp black or colored spots.

White spots

White spots are visible inside solid images or halftone image areas because of missing toner.

Spots with toner

Toner aggregated inside the machine has been transferred to paper.

White spots with toner cores

White spots with pieces of aggregated toner in the center visible in solid color areas. Pieces of aggregated toner may be irremovable.

Fish-shape stains

Stains in the shape of small fish which appear to be swimming in the paper feed direction.