CORRUGATED PACKAGING

Thickness Testing

Thickness testing measures the width/thickness of corrugated board. It is used to determine caliper and to compare variations between samples. In general, stronger packaging can be created by using thicker corrugated board.

Multiple material properties will correlate to thickness of a board. The overall strength of a box, the board’s bending stiffness, and many other properties all relate back to the overall thickness of the corrugated board. The thickness is a product of flute size, number of layers of paper, and paper thickness.

Package testing and materials testing are important parts of the research and development process. Testing helps ensure that all corrugated board and new package designs are created specifically to handle real-world situations.

Standards:

ISO 3034
TAPPI T411

ISO 3034: Corrugated fibreboard – determination of single sheet thickness.

This International Standard specifies a method for determining the single sheet thickness of corrugated fibreboard intended for use in the manufacture of packing cases and is applicable to all types of corrugated fibreboard.

TAPPI T411: Thickness (caliper) of paper, paperboard, and combined board.

This method describes the procedure for measuring single-sheet thickness and variations in single sheet thickness of paper, paperboard, and combined board. The term “combined board” encompasses both corrugated and solid fiberboard.

Equipment:

Exact Automatic
Micrometer: Model DW

by E.J. Cady & Company

Anvils: 5/8″ 
Range: 0 – 1/2″
Pressure: 5.8+ p.s.i.
Accuracy: +.0002″ – .0003″ (+.00508 mm – .00762 mm)