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Prescale logo

Pressure measurement film



This is the only film in the world that can measure pressure.Pressure and pressure distribution, which could not be visually observed in the past, can now be easily confirmed.

Structure and principle

Structure of Prescale

There are two types of Prescale: the two-sheet type and the mono-sheet type. The two-sheet type is composed of two films of which are respectively coated with color-forming material and color-developing material. This type is used by placing the sides coated with the chemical agents over each other. The mono-sheet type is a film with a single base film with a coating of color-forming material and developer.

How Prescale works

The microcapsules in the color-forming layer are broken by pressure, and the colorless dye is absorbed into the developer, causing a chemical reaction to produce a red color. The microcapsules containing the color-forming material are adjusted to varying sizes and strengths, and is coated uniformly, producing a color density that corresponds to the amount of pressure.

Pressure chart

By checking the standard chart, the pressure value can be confirmed visually.

for medium-pressure [MW]
Continuous pressure
Momentary pressure
  • * The parts represented by the dotted lines may exceed the allowable error range, so it should only be used as a reference.
  • * Prescale is used by selecting curves A, B, or C depending on the temperature and humidity conditions.
  • * The measured pressure reaching time for continuous pressure of Ultra extreme low pressure (5LW), extreme low pressure (4LW), and ultra extreme low pressure (LLLW) is 5 seconds, and the measurement maintenance time is 2 minutes.
  • * Super high pressure (HHS) is only for continuous pressure.

How to use Prescale

1)【Illustration】 How to use

2)【Video】 How to use Prescale