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Some common terms you may hear are defined below.

Burst Strength
The force required to rupture corrugated combined board with a rubber diaphragm; relates indirectly to the ability of a box to withstand external or internal forces.

Corrugated Board
The structure formed on a corrugator by gluing one or more sheets of fluted corrugating medium to one or more flat facings of linerboard.

Edge Crush Test (ECT) Value
The amount of force needed to cause compressive failure of an on-edge specimen of corrugated board; a primary factor in predicting the compression strength of a completed box.

End Loading/Opening Regular Slotted Container
An RSC designed to be filled from the side by sliding the product into the box. The flute direction is normally vertical when the box is in its end-opening position.

Extensions of the panels that form the four side walls of a box. Flaps are usually defined by one score line and three edges. When folded and sealed with tape, adhesive or wire stitches, flaps close the remaining openings of a box. Regular slotted containers have eight flaps.

Knocked Down (KD) Box
A flat, unopened box where the manufacturers joint has been sealed. A KD box may be designated as “right hand” when the longer panel appears on the right or as “left hand” when it appears on the left.

Manufacturers Joint
A joint (seal) made by the box manufacturer, who folds the scored and slotted box blank in two places, brings one side panel and one end panel together and joins them with adhesive or staples.

For every colour to be printed, a plate is made and mounted on a cylinder, forming a key part of the printing process. To make a complete picture, regardless of whether you are printing on flexible film or corrugated paper, the image transferred from each plate has to register exactly with the images transferred from the other colours.

A “face” or “side” of a box, usually defined on a scored and slotted sheet (box blank), by four score lines or three score lines and one edge. Regular slotted containers have four panels.

Regular Slotted Container (RSC)
A box style manufactured from a single sheet of corrugated board. The sheet is scored and slotted to permit folding. Flaps extending from the side and end panels form the top and bottom of the box. All flaps are the same height from the edge of the sheet to the flap score lines. The two outer flaps (normally the lengthwise flaps) are one half width of the container so that they meet at the centre of the box when the user folds them. Flute direction may be either perpendicular to the length of the sheet (usually for top-opening RSCs) or parallel to the length of the sheet (usually for end opening RSCs).

A well-defined impression or crease in corrugated or solid fibreboard made to position and facilitate folds.

A rectangle of corrugated board, untrimmed or trimmed, and sometimes scored across the corrugations when performed on the corrugator.

Single Wall Corrugated Board
The structure formed by gluing two sheets of linerboard, one to each side, to a sheet of fluted corrugating medium.

A pair of closely spaced parallel cuts including removal of the strip of material between the cuts, made in a sheet of corrugated board, usually to form flaps and permit folding without bulges caused by the thickness of the material.

Top Opening Regular Slotted Container
An RSC designed to be filled from the top and remain upright. The flute direction is normally vertical, providing maximum stacking strength.

Inside dimensions are given in the sequence of length, width and depth (International organisations may use the words length, breadth and height). The inside dimensions of a finished box are critical for proper fit around the product. Box manufacturing is based on this fit. The outside dimensions of the finished box must be considered for proper palletisation and distribution. Length is always the larger number of the length and width. Depth is the distance perpendicular to the length and width. End-opening boxes are measured as though they were top-opening.