A ghost of an image that appears on the reverse side of coated paper printed on a blaketto-blanket press (usually a web offset press) cause by the uneven pressure that has resulted from piling on the blanket adjacent to the image.

PLATE CHAMP

A device that grips the lead and tail edges of a printing plate and pulls it tight against the cylinder body. The position the cylinder body. The position clamps is relevant to the image position or register of the image in relation to the other printing plates and the images squareness on the sheet.

A small, flexible blade used to mix small batches  of ink on a slab.

PERFECTING

Printing both sides of a sheet in the same pass through the press in xerography , perfecting is called duplexing.

A thick cotton fabric similar to flannel. It has a long nap and is used to cover form rollers in conventional lithographic dampening.

ON-DEMAND PRINTING

Commercial-quality printing produced as needed with turnarounds of a few hours or less. Often associated with every short runs of a hundred or fewer pieces and the use of digital printing press.

An ink with the fine aluminum, bronze, or copper powders in its pigments.

METERING NIP

The line of contact between two rollers in the dampening system of a lithographic press.

A screen printing in which the screen maintain s a position papallel to the printing bed, but recedes diagonally during the feed/take-off cycle.

LEAFING

The phenomena that occurs when metal flakes in metallic inks float to the surface of the ink, giving it a particular luster.

On a sheetfed  press, the leading edge of the paper that rests at the head stops and is grabbed by mechanical  fingers known as grippers. The press operator typically marks the gripper edge with an “xxx” before sending the job to the blinding and fishing area.

HICKEY-PICKING ROLLER

A roller that has synthetic fibers embedded in its surface, to help it remove hickeys from the surface of an offset printing plate or to fill in the white ring on the plate surface. This roller replace one of the ink form rollers.

A series of devices that halt the forward movement of a press sheet on the feedboard. The front stops square the sheet in relation to the printing cylinders and determine the print margin. The front stops are part of the three-point register system.

GEAR STREAKS

Parallel streaks appearing across the printed sheet at the same interval as gear teeth on a cylinder.

A serious of devices that halt the forward movement of a press sheet on the feedboard. The front stops square the sheet in relation to the printing cylinders and determine the print margin. The front stops are part of the three-point register system.

GEAR STREAKS

Parallel streaks appearing across the printed sheet at the same interval as gear teeth on a cylinder.

Paper, cloth, or rubber-covered rollers that distribute water to the printing plate in t in the lithographic process

DISCHARGE PRINTING

Pattern-printing darkly dyed textile substrates with a color-removing chemical to produce a design into which lighter hues may be printed

A flexo or sheetfed or web offset press that has one large-drum impression cylinder, which holds or supports the substrate, and several color stations (plate/blanket cylinder pairs) positioned around it.

CUTOFF LENGTH

(1) The distance between corresponding points of repeated images on a web.

(2) The circumference of the plate cylinder.