F-FLUTE
One of the wave shapes (A, B, C, D or E) pressed into corrugated board. F-flute has 96-flute shapes +/- in 4 foot of corrugated board or 315 flute shapes within 15 meters of corrugated board. The approx. height of the flute is .045″ (.114cm) not including the thickness of the facings. The Take-up factor is 1.23.
FEED THRU PUNCHES
Cutting punches used in cutting dies which have clearance built into them so that the material being die cut in the punch flows up through the punch and ejects out the back of the punch. Used mainly to cut gaskets and seals.
FIBREBOARD
The general term applied to fabricated material used in container manufacture. May be of either corrugated or solid construction.
FIBREBOARD (SOLID)
Container board made of two or more plies of paperboard laminated into a solid sheet. Thickness generally range from .005 to .120 inches.
FINISH DIEBOARDS
Birch steel rule dieboards produced in Finland.
FIXTURE
Any mechanical aid that is constructed to aid in the implementation of the diecutting process or in any assembly operation of the manufacture of a product.
FLAT BED PLOTTER
A digital plotter using plotting heads or pens that hover over a flat surface in both horizontal or vertical directions vs a roll plotter to draw or plot out a designed image onto paper,mylar or dieboard.
FLAT DIE
A cutting die that has a is constructed so that it has a flat edge for cutting against a flat cutting surface vs a multi-contour die which follows the contours of a three dimensional part and cuts against a corresponding three dimensional or contoured cutting base.
FLEX
Another term for deflection of rolls or cylinders in press. Also bending qualities or characteristics of any material, include printing substrates.
FLEXIBLE PACKAGING
Packaging using such films as foils, transparent films, paper, flexible sheeting, etc. to form a container such as a bag.
FLEXING
A condition that can occur on a die blade especially with thinner walled cutting blades. The die blade will move or flex from its original pattern due to side wall pressures on the blade from the materials being diecut or from the ejector material in the die. The flexing of the blade can change the shape of the original pattern and force a diecut out of tolerance.

FLEXO
Short definition for Flexography
FLUTE
The wave-shaped formation of the enter component of corrugated fiberboard. See definitions of A, B, C, E or F flutes for characteristics of each flute size. Four standard flute sizes are in common use, designated as A, B, C and E. The sizes were given their names in the sequence of their introduction. A is the largest. B which is smaller, then the next smaller size C was introduced whereas E was the smallest and most recently introduced flute measurements are given with a plus or minus allowance.
FLUTE (or Corrugation) DIRECTION
The normal direction of flutes is parallel to the depth of the box, so that they are vertical when the box is stacked for shipment. In end opening and wrap around box styles, the flute direction may be parallel to the length and width resulting in a “horizontal corrugation box”.
FLUTE OR CORRUGATION. FEEDER
The section of a press, which separates the sheets and feeds them in position for printing.
FOIL STAMPING
The process of applying different colored and design foils onto a substrate.
FORGED DIE
A cutting die made from steel which is heat-treated, welded, ground and filed to the proper dimensions or shape of the parts it is to cut. Originally, a blacksmith forge was used to heat the die steel to allow a blacksmith forger to shape the steel into its desired shape and wall construction.
FORGING
A clicker die or an all steel high die is heated over a coal forge and a diemaker called a forger would bend the die steel to the shape of the die pattern. The process was often referred to as forging.