What is prescale?

Prescale (also known as pressure measurement film) Fujifilm PrescaleThis is a special type of film manufactured by Fujifilm, used to measure and test the level and distribution of pressure between two contacting surfaces.

The main characteristics of Prescale:

• Working principle: The film contains microcapsules that hold the dye. When pressure is applied, these particles break open and react with the color developer layer, creating streaks of red.
• How to read the results: Color intensity (dark or light) is directly proportional to the level of pressure. The darker the color, the greater the pressure at that point.

• Classify:
  • Two-sheet type: It consists of plate A (containing microcapsules) and plate C (containing the color developing layer), used for low to medium pressure ranges.
  • Mono-sheet type: Both layers are integrated onto a single film, for use in high-pressure applications.

• Common applications:
  • Checking the balance of rollers (in the printing, papermaking, and textile industries).
  • Measure the clamping pressure of molds, presses, or electronic components.
  • Check the pressure distribution of brakes, clutches, or seals in the automotive industry.
  • Foot or joint pressure analysis in medical settings.

Classification and selection of pressure measuring films Fujifilm Prescale It depends primarily on the pressure range you need to measure. This film system is divided into 9 main types based on force intensity. 

1. Classification of Prescale by structure and pressure range

Prescale has two main structural forms depending on the pressure level:

• Two-sheet type: It consists of film A (containing color microcapsules) and film C (containing the color developing layer). When measuring, the two sides of the film are pressed together. This type is used for pressure ranges from very low to medium.
  • 5LW (Ultra Extreme Low): 0.006 – 0.05 MPa.
  • 4LW (Extreme Low): 0.05 – 0.2 MPa.
  • LLLW (Ultra Super Low): 0.2 – 0.6 MPa.
  • LLW (Super Low): 0.5 – 2.5 MPa.
  • LW (Low): 2.5 – 10 MPa.
  • MW (Medium): 10 – 50 MPa.
• Mono-sheet type: All chemical layers are integrated onto a single plate. This type is more durable and suitable for high pressure applications.
  • MS (Medium): 10 – 50 MPa.
  • HS (High): 50 – 130 MPa.
  • HHS (Super High): 130 – 300 MPa

FUJIFILM – Japan model: LLLW (270mm x 5m)

2. How to choose the right Prescale 

To choose the right type of film, you need to follow these steps: 

1. Determine the expected pressure range: Calculate pressure using the formula. $P=F/S$P = F/S (Force / Contact Area). If you are unsure, start by experimenting with the type. LW (Low) or MW (Medium) To estimate the color range, then adjust to a film type with a narrower and more precise measurement range.
2. Consider the environmental conditions:
   • Temperature & Humidity: The most accurate measurement results are obtained under standard conditions (23°C, 65% RH). If measuring in a hot environment, please consider the current. Prescale for High Temperature (High heat resistance) to avoid distorting the results.
   • Duration of force application: Check whether the force is static (long-term pressure) or impact (instantaneous) to refer to the corresponding color chart in the accompanying instruction manual.
3. Accuracy requirements:
   • If you only need to observe the distribution of force (whether it's even or not), you can see it with the naked eye.
   • If you need precise data (error less than 10%), you should combine the use of film with... FPD-8010E digital image analysis system to convert color density into a specific numerical value

The selection Semiki Instrumentation Co., Ltd For advice and to purchase Fujifilm Prescale pressure gauge film, this is a suitable option in Vietnam due to the following strengths:

• Reputable company:  Semiki is a distribution partner for many major measuring equipment manufacturers, including Fujifilm.
• Product variety: Semiki offers a full range of prescales from extra-low pressure (LLLW) to high pressure (HS) in coil or sheet form.
• Technical support: The company has a maintenance and repair center and a team of consultants specializing in film applications for manufacturing evaluation, such as roller pressure measurement, molding, or electronic component compression force analysis. 

Featured Prescale products at Semiki

You can refer to some of the pressure ranges that Semiki commonly offers:

• Ultra Low Current (LLLW): 0.2 – 0.6 MPa.
• Low current (LLW/LW): 0.5 – 10 MPa (Examples: LLW-R270, LW-R270).
• High Line (HS): 50 – 130 MPa

Contact Semiki:

Website: You can find out more details and send a consultation request via Semiki.com.

Business email: [email protected]

Phone number (Hotline): +84 979 761 016.