Meisterprüfung Buchbinder Practice Questions - Meisterprüfung Buchbinder (Austria) Exam

Cellulose fibers suspended in the wet pulp slurry preferentially align parallel to the moving wire screen in the machine direction (Maschinenrichtung) due to fluid flow dynamics and wire speed. Fibers are oriented perpendicularly to the paper web by the pressure pulses of the dandy roll (Egoutteur). Grain direction is created exclusively during the calendering process (Satinieren) by heated steel rollers pressing the dry sheet. Grain direction is determined by the crosswise application of internal sizing starch in the size press (Leimpresse).