In the simplest form of the parallel fold, all folds go parallel. The letter fold, the gatefold, the Leporello fold, and the double parallel fold are part of the parallel folds. Parallel folds are frequently applied to simple advertising prints.
b ) Letter Fold
The letter fold is a form of the parallel fold at which two or more equally wide parts of the fold bend are joined with a lock seam without changes of direction around a bend part. The fold going respectively in the same direction is the reason for the name. Three pages or six pages are the results of two parallel folds from one fold bend. This is called a double letter fold. A three triple fold yields four / eight pages etc.
c) Gatefold
The gatefold, seldom called church fold, owes its name to the similarity to three-part winged altars in churches. In this form of the parallel fold the exterior parts of the fold bend are joined inside with a lock seam without overlapping. The altar fold has six pages, an additional break in the bend middle yields the eight-sided gatefold.
d ) Leporello or Zigzag Fold
The Leporello fold is a form of the parallel fold at which two or more parts of the fold bend are joined with a lock seam in changing directions. Through this, a zigzag-like fold arises, therefore this form is called zigzag fold. Three/six pages are the result of a two parallel fold.
e ) Double Parallel Fold
The double parallel fold & parallel map folds require a four-panel design (8 pages). This fold is commonly used for larger sheet sizes. The two inside panels are slightly narrower than the two outside panels. This fold is popular for programs and promotional pieces.
f) Cross Fold
The cross fold requires repeatedly folding in right angle. This method is applied when the fold bend is stapled and cut for the production of booklets, magazines, books. The direction of movement of the paper should run parallel with the last fold.
Modern technology and a perfectly structured network enable us to meet the highest demands on quality. We continuously work on the optimisation of our processes - from consulting through the pre-print stage to production and delivery. A strict quality control monitors the results of the print processes.
The process standard for offset printing (PSO) is a further development of the work in the 1970s to the "Standardization of the offset printing process". It was developed from the Fogra together with the Federal Association of Printing and Media e.V. It also served as a basis for the development of the international standard series and is therefore conform. The PSO describes the standardised procedure for the production of printed products. With suitable test equipment and control methods described by the PSO the manufacturing processes from data processing over printing form production to the finished print is monitored, controlled and checked.
The aim is to make the modern collaborative production process as efficient as possible and at the same time to ensure the intermediate and final results of a predictable colour quality.
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