Print can be removed by scratching the surface. Print fails adhesion tape, rub or wrinkle tests. Causes: - Wrong [..]
An undesired adhesion between touching layers of material caused by moderate pressure and/or temperature change. The [..]
Ink film cracks or breaks on substrate when flexed. Causes: - Excessive heat or UV exposure level in [..]
Creases form in substrate. Causes: -Baggy substrate; - Web guide not operating or properly set; - Press out [..]
UV ink fails to cure in the correct place on the press. As UV inks and coatings are exposed to ultraviolet light: Little [..]
Excessive ink transfer to substrate. Excess colour strength. Causes: - Ink viscosity too high or too [..]
An excessive increase in the size of a halftone dot from film to the printed image. Causes: -Excessive ink [..]
Irregular edges around a print, often undesirable marks made on the image's trailing edges, generally caused by an [..]
Accumulation of excess ink on and around the plate surface, especially in regard to small type and halftones. [..]
Excessive foam present in the printing unit, tray or ink pump unit. Causes: Incorrect solvent balance; Incorrect [..]
Parallel lines of misprint on the substrate. Causes: - Gears not meshing together correctly; - Butt-cut [..]
The presence of a faint image of a design in areas, which are not intended to receive that portion of the image. [..]
An undesirable peripheral outline around the edges of the printed image. There are two halo faults: If the print looks [..]
A small, solid print area encircled with a white halo. Causes: - Dust on the substrate transferring to the plate; [..]
Ink dried on plates and rollers and not transferring to substrate, normally found on leading edge of substrate. [..]
One colour bleeds into another. Colours do not overprint (trap) correctly. Ink picks off or transfers to press rollers. [..]
One part of the design is not correctly positioned with another. Causes: - Plates not mounted in register; [..]
Undesirable interference pattern in process printing. Causes: - Improper screen angles; - Anilox screen count too [..]
Excessive foam present in the printing unit, tray or ink pump unit. Causes: - Ink too weak or too low in [..]
The lifting of any portion of the surface of the substrate or a previously printed colour during the printing [..]
When printed ink fails to form a complete continuous coverage, evident by the random formation of small holes in the [..]
Poor or no ink transfer onto the substrate, evident as a partial image or a missing portion. Causes: [..]
A condition caused by slippage at the moment of impression between the substrate and plate. Slur is characterised by the [..]
A print defect where an unwanted image appears, often as a dark line in a light or solid print area. Tracking occurs [..]
Some of the ink's ingredients go out of suspension, causing loss of ink flow with a tendency to curdle. Causes: - [..]
Unwanted ink transfer onto substrate, ink metering system out of adjustment or damaged. Causes: - [..]
Parallel thin lines or bands about 1 mm wide, present in solid print areas running in the direction of the press. [..]
Superimposing one colour onto another so that the first down does not lay properly before the next colour is printed. [..]
A print fault on corrugated substrate characterised by darker lines appearing at the flutes from the uneven surface of [..]
The colour is lacking in colour strength and body. Causes: - Excessive reduction in ink viscosity; - Excess [..]