Brochure: Texture Application Note: Blister PackSource: Brookfield Engineering Laboratories, Inc.
When a trigger force of 15 g has been attained at the sample surface, the probe proceeds to exert a force on the blister pack to a distance of 8 mm during which time the capsule is pushed out of the pack. The maximum force to expel the capsule is indicated by a peak on the graph. This is a measure of “hardness 1”. The area under the curve is automatically calculated as the “Work Done Hardness 1.” The higher the force to expel the capsule from the blister pack, the harder the packaging material.