Alphabetical Search: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | BACK
Common Terms - O
OD100 Process a proprietary term used to describe Champion's bleaching technology that combines oxygen delignification and 100% substitution of chlorine dioxide for elemental chlorine. see also bleach filtrate recycling, elemental chlorine free, oxygen delignification.
Offset Printing (Offset lithography) Currently the most common commercial printing method, in which ink is offset from the printing plate to to a second roller then to paper.
Office Reprographic Paper commonly referred to as reprographic paper, includes a variety of business paper grades (both cut-size and copier rolls), like bond, mimeo, duplicator, and reproduction papers. see also bond paper, electronic printing, xerography.
Off-machine Coating coating paper after it comes off the papermaking machine rather than while it is still on the machine. Off-machine coaters may be used to add a single layer of coating to a paper, or to add a second layer to a paper that has already been machine coated. see also coated paper.
Offset an indirect printing process. Ink is transferred to paper from a blanket that carries an impression from the printing plate, rather than directly from the printing plate itself. Generally, when we say "offset" we mean "offset lithography," even though other printing processes, such as letterpress, may also use this indirect technique. The term offset (or "set off") can also refer to the smudges created when ink from one printed sheet transfers to another. Offset spray is used to prevent this. see also impression cylinder, lithography, planographic, plate, printing processes.
Offset Papers book and text weight papers that are made to withstand the rigors of offset printing. These papers are more resistant to water and less susceptible to picking. Most book and text grades of paper can be used on offset presses. Often the term "offset" is used synonymously with "book." The basic size of off- set papers is 25"x38". see also basic size, book papers, picking, text paper.
Opacity a measure of how opaque a paper is. The more fibers or fillers a paper has, the more opaque it is, and the less it allows "show- through" of the printing on the back side or on the next page. Opacity isn't always determined by thickness or weight; a thinner paper may have more opacity than a thicker paper if opacifying thickeners are used. see also calcuim carbonate, fillers, thickness, titanium dioxide, weight.
Oxygen Delignification a processing step that takes place after pulping and before bleaching. Oxygen is used to remove lignin (delignify) resulting in lower chemical usage in the bleach plant. see also bleaching, lignin, OD100 process.