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A concertina fold, also known as a zig-zag fold, accordion fold or z-fold, is a continuous parallel folding of brochures and similar printed material in an accordion-like fashion, that is with folds alternatively made to the front and back in zig-zag folds. Because they do not nest (as in Letter Folds) panels can be the same size.
A locked letter from 1603. Letterlocking is the act of folding and securing a written message (such as a letter) on papyrus, parchment, or paper, without requiring it to be contained in an envelope or packet. It is a traditional method of document security that utilizes folding and cutting. [1]
1: letter/C tri-fold, 2: gate tri-fold, 3: roll/double gatefold, 4: accordion z-fold, 5: double (parallel) fold, 6: double right-angle / French fold. Brochures available in electronic format are called e-brochures. This format has the added benefit of unlimited distribution and cost savings compared to traditional paper brochures. [4]
Folding machines exclusively used for folding paper are commonly referred to as paper folders. These machines are typically used for creating letter folds (C Folds) and accordion folds (Z Folds). Other commonly used folds include a half fold, fold-out, double parallel fold, gate (brochure) fold, and right angle fold. [1] [2]
For document security, the letter sheet can be sealed with wax. Another secure form of letter sheet is a locked letter, that is formed by cutting and folding the sheet in an elaborate way that prevents the letter from being opened without creating obvious damage to the letter/envelope. A Japanese funeral envelope used for offering condolence money.
Book folding is the stage of the book production process in which the pages of the book are folded after printing and before binding. [ 1 ] Until the middle of the 19th century, book folding was done by hand, and was a trade.
The standard defines the "A", "B" and "C" series of paper sizes, which includes the A4, the most commonly available paper size worldwide. Two supplementary standards, ISO 217 and ISO 269 , define related paper sizes; the ISO 269 " C " series is commonly listed alongside the A and B sizes.
An aerogram, aerogramme, aérogramme, air letter or airletter is a thin lightweight piece of foldable and gummed paper for writing a letter for transit via airmail, in which the letter and envelope are one and the same. Most postal administrations forbid enclosures in these light letters, which are usually sent abroad at a preferential rate ...