Pressurex – a tactile indicating sensor film for use in checking weak spots and sealing die pressure – has been developed by US company Sensor Products Inc.

The film can be used in R & D and quality control for applications such as validation and calibration of sealing die pressure during food and drug packaging. A typical application is in aseptic packaging systems such as CAP/MAP.

“Pressurex can also aid in fulfilling GMP compliance by revealing weak spots, channels and wrinkles at the sealing surface,” explained Jeffrey Stark, senior technical manager. “Additionally, Pressurex is useful in taking nip impression between rollers, and in the cosmetics industries in package drop test measurement.

Pressurex comes as a large, 8ml sheet that, when placed between impacting and mating surfaces, instantly and permanently changes colour. Colour intensity is proportional to the amount of force applied.