Search for glossary terms (regular expression allowed)
Begin with Contains Exact term
Term Definition
Calendar Blackening

A term descriptive of darkening of the intended shade of paper by excessive calendering or by calendering wet paper.

Calender Cut

Defects caused by creasing or cutting of the web of paper during calendering due to wrinkles in the web.

Calender Spots Or Scars

(1) Defects in paper in the form of indented spots. They are caused by foreign matter adhering to the calender rolls. (2) Marks on paper caused by material sticking to a calender roll.

Calender Stack

(1) A series of highly polished rolls which are used to control paper smoothness and caliper by adjustments to the load on the rolls. (2) Steel rolls at the dry end of a paper machine which smooth and level the sheet of paper.

Calender Streaks

Dark lines in paper, parallel to the grain. Caused by uneven pressing and drying before calendering.


(1) The thickness of a sheet of paper, expressed in thousandths of an inch (mills or points). Sometimes referred to as bulk. (2) The thickness of a sheet measured under specific conditions. It is usually expressed in thousandths of an inch (points or mils).


A means of supporting the machine by beams across and on the rear to hold the front side suspended (without support) for felt and fabric changes.

Capital Expense

Any expenditure involving a depreciable piece of equipment.

Carrier Ropes

A series of ropes which travel over pulleys and carry the paper thread trough the dryer sections.


Refers to caustic soda (sodium hydroxide).

Caustic Soda (Naoh)

An alkaline chemical used as a makeup chemical in our cooking liquor. It is also used for pH control in our bleach system, demineralizer, and softening at the filtered water plant. In the paper mill it is used for boiling out paper machine equipment and system. It is highly dangerous.


Low pressure created by the suction of a pump causing a boiling action as the liquid begins to vaporize creating bubbles of vapor.

Cellulose Fiber

The fibrous material remaining after the non-fibrous components of wood have been removed by the pulping and bleaching operation; used in making paper.

Center Roll (Granite Roll)

The main roll of the Sym Press II press section.

Chemical Pulp

Pulp obtained by cooking wood with solutions of various chemicals. The principal chemical processes are the sulfite, sulfate (kraft), and soda processes.

China Clay

An excellent grade of clay used with similar materials as filler for paper.


"A term applied to paper machines with rotating knives which cut pulpwood logs to chips about 1"" square and 1/8"" thick."


Chopped wood prepared for cooking to produce pulp.


The addition of free chlorine to water to control the bacteria population. Also, one of the pulp bleaching stages.


Greenish-yellow gas. It is highly toxic and irritating. It is used as a bleaching agent and for bacteria control and for a water treatment.