Materials Testing

Materials testing is used to compare properties of candidate packaging materials. Which one is stronger? Which is more slippery? Which has the lowest porosity? Testing is done on the raw materials rather than the finished package and is useful in selecting packaging materials, as well as troubleshooting when things don’t go as planned.

Featured materials testing services

Tensile Properties

Tensile properties of plastic films can help characterize their suitability for use in medical packaging.

Gelbo Flex Crack Resistance

Good flex crack resistance will reduce the propensity of the package developing holes during the distribution cycle thereby destroying the package integrity.

Tear Strength

Tear strength may be measured by using an Instron® tensile tester or an Elmendorf tear tester.

Air Impermeability

Air impermeability is measured using a Gurley porosity meter.

Microbial Barrier

Microbial Barrier is the property of medical packaging substrates to resist the passage of microbes.

Corner Thickness Measurement

Corner Thickness Measurement is a non-destructive test performed on flexible or rigid trays that have been produced by thermoforming.

Puncture Resistance

Puncture resistance of substrates can be measured using the Instron® testing system, the Spencer impact method or the Dart Drop Test.

Coefficient of Friction

Coefficient of Friction (COF) is measured using a friction tester. Friction may be measured film-to-film or film-to-metal depending on the situation.


Porosity is measured (in the U.S.) using a Gurley porosity meter.


The Sheffield smoothness of a substrate is calculated by measuring the rate of air flow over the surface of the sheet.

Ink Adhesion

Ink adhesion may be evaluated using ¾-inch wide Scotch® brand 600 adhesive tape, placing the tape firmly over the area to be tested and removing it quickly at a 180 degree angle.