Creasing is the process of applying straight grooves to a printed sheet. They are applied to the paper in the form of pronounced scars that pass along the folding lines.
The need for scoring is determined by a significant simplification when folded along the line of cardboard or paper with a density of 150 g / m 2 . The groove produced during the scoring process is called "big" and allows you to easily and evenly bend the sides of the sheet.
Scoring is an operation that can be performed not only with paper, but also with various materials. For example, laminated sheets, bound cardboard, plastic sheets, many types of film are subject to scoring.
The difference between scoring and folding
Folding, punching and creasing are processes used in the production of advertising and office supplies. These processes are indispensable for the production of invitation and entrance tickets, gift boxes and bags, as well as for the production of large quantities of printed material.
In the printing industry, the meaning of the word “creasing” should not be confused with folding. These processes are completely different, performed on different equipment and in a certain sequence.
As a rule, scoring is a process that precedes folding. Conducting scoring allows you to facilitate processing when folding.
The folding method achieves the formation of a notebook or other printing products from already printed sheets. By folding, it is possible to achieve successive folds. Using this method, you can easily create a brochure, book or magazine from several notebooks.
The folding result is affected by the thickness and volume of the paper, the moisture and the direction of the fibers toward the fold, the number of folds and the folding method.
When make scoring
Scoring replaces conventional bending technology with the possibility of distortion of the image shown on the sheet or when using cardboard products. It is necessary to determine its need at the prepress level to make special marks in the layout process.
Creasing is a process that protects the fold from cracking and gives the print a neat appearance.
The action is performed using blunt circular knives or rectangular plates mounted on a creasing machine. In the working process, the machine presses and compacts the material.
Scoring equipment is divided into rotary and percussion. Impact is usually used in small-scale production, and rotary equipment is indispensable for large-scale operations.
Manual scoring method
If the line of the big is perpendicular to the paper fibers, it is necessary to apply a manual scoring. The use of the manual method allows you to achieve clear fold lines and protect the sheet from unwanted creases.
Manual scoring is used when manufacturing products in small print runs or when issuing an exclusive edition. The manual scoring method, in accordance with the complexity, costs a little more than the machine one.
Scoring tool
Conventionally, scoring tools differ on the side of the fold, that is, there are tools for drawing a fold line from the inside of the sheet or from the outside.
Scoring board sold separately, and not only printing organizations can purchase it. Ease of use and the absence of restrictions on the sheet format makes it possible to use it for a large format.
The board comes with a special triangle used to make envelopes that vary in length and width. The board contains marked markings.