Balance Correction 
A process used to correct roller imbalance and associated rotation by either lessening roll weight through drilling or increasing roll weight by adding weights to the roll interior.

Balance Toleration 
The amount of imbalance that a roller can tolerate while still working properly.

Bearing 
A rotary support mechanism placed either on the interior or exterior of a roll to facilitate roll movement.

Calendering 
A process by which paper is made by passing it between two rollers, smoothing and polishing the surface.

Coil Coating 
A process in which a series of rubber rollers deposit a thin film of paint coating on a continuous metal or plastic web.

Doctor
A blade-like device that removes foreign matter from a roll. The doctor rests on the uprunning surface of the roll.

Dynamic Balancing 
Balancing in which a certain degree of rotation occurs due to imbalance. Dynamic balancing is corrected in a balancing machine.

Durometer 
An apparatus used for measuring the hardness of rubber.

Elastomer 
A material, such as rubber, capable of returning to its initial length after being stretched at room temperature to twice its original length.

Glaze 
A build-up on rubber rollers or the blanket of a printing press that negatively affects uniform ink distribution.

Piling 
The building up of ink on the rollers, plates or blankets of a printing press.

Roping
Using a bar or roller to gather the full width of stretch film to create a “rope” that is nearly unbreakable.

Static Balancing
Balancing, often occurring in low-speed applications, in which the roll is properly balanced so that no rotation occurs.

Web 
Paper used in print media, insert cards, etc. and sold in a roll for high volume, high-speed printing.

Web Handling 
The industry involved in processing continuous material strips called webs that will be used in future processing operations. Common web materials include plastic, metal and paper.