Fujifilm Prescale Ultra Low LLLW Pressure Film

The Fujifilm Prescale Ultra Low LLLW (3LW) pressure-indicating film is an engineering diagnostic tool that makes invisible surface pressure visible. When placed between two mating, touching, or impacting surfaces, the film undergoes an instantaneous and permanent color change that corresponds to the magnitude of pressure applied at each point. The result is a detailed pressure "map" showing both where contact occurs and how much force is concentrated at each location, measured within its calibrated range of 28 to 85 PSI (2 to 6 kg/cm²). This makes it invaluable for applications like verifying heat seal bar uniformity, checking lamination roller pressure, assessing gasket sealing surfaces, and analyzing clamping force distribution.

The film itself is paper-thin and supplied on a roll measuring 1 foot by 10.6 inches, allowing it to be easily cut with scissors or a laser to match any application geometry. Because it is so thin, it can be inserted between surfaces without meaningfully altering the contact characteristics being measured. The color change occurs in less than a millisecond, making it suitable even for impact testing. Each purchase includes Fujifilm's revised Best Practices Guide, which covers proper storage, film preparation, application techniques, and interpretation of results — a particularly valuable resource for users new to pressure-indicating film. All film is guaranteed to have at least 18 months of shelf life remaining at the time of purchase.