You are here: products ·prescale film 4LWDescription: Fuji Prescale Film pressure-sensitive film, suitable for measuring the distribution of surface contact pressures (range 4LW: from 0.05 to 0.2 MPa; from 0.5 to 2 kgf/cm²; from 7.25 to 29 psi).
Pressure-sensitive Prescale film for measuring the distribution of surface contact pressures, range 4LW: from 0.05 to 0.2 MPa (from 0.5 to 2 kgf/cm²; from 7.25 to 29 psi)
Fuji Prescale Film 4LW: Overview
The Prescale film with a measurement range of 4LW is one of the recent innovations introduced by Fuji Film Japan, aimed at completing the range of available measurement fields
within the broader Prescale product family, confirming the undisputed maturity achieved by this type of product (previously Fuji Film had already introduced the HHS measurement range),
whose use is now undoubtedly consolidated in numerous application fields.
Responding to specific market needs, primarily originating from the electronics and microelectronics sectors (see examples shown to the side and below), Fuji Film
Japan developed a pressure-sensitive film capable of operating with minimal contact pressures: the Prescale 4LW, in fact, covers all
applications ranging from 0.05 MPa to 0.2 MPa (from 0.5 to 2 kgf/cm²; from 7.25 to 29 psi).
The ability to quickly and reliably check for surface defects in the production of printed circuit boards, verify the correct and uniform application of
pressures during semiconductor processing, such as CMP (Chemical Mechanical Polishing) of silicon wafers, etc., has been significantly facilitated
and simplified by the Prescale pressure-sensitive film. Although the Prescale film was developed by Fuji Film in the late seventies, numerous additional
applications have been successfully addressed by Prescale (see specific sections), and even today, several years after its introduction, new applications
continue to be added to the already known ones. The situations in the manufacturing and production sectors that require verification of the correct amount
and distribution of applied pressure are numerous, and the ability to control this important parameter also helps extend the operational life of machines
and their parts, improving the quality levels of production and, in some cases, even increasing personnel safety. The consistency and stability of the applied
pressure, in conjunction with the various production processes that use it, thus enhance the final quality of production by indirectly allowing for the control
and improvement of the repeatability of the process itself. The Prescale product range is, in fact, a methodology for study, analysis, and verification
that can be advantageously used in the context of surface contact phenomena, without requiring specific skills or particular technical knowledge for its use.
The use of the Prescale pressure-sensitive film is very simple, fast, intuitive, and does not require specific preparation; on the contrary, from its first use,
the image impressed with the different levels of magenta red will offer a clear visualization of the pressure distribution, which can be interpreted by direct
comparison with the reference colorimetric table provided or through more accurate and repeatable electronic measurement means.
Numerous studies conducted by authoritative and external parties have confirmed the validity, accuracy, and repeatability of these results, even when
compared with other survey methodologies characterized by other technologies; indeed, many production realities have "normalized" numerous internal quality
checks based on the use of Prescale film. It is noted that the Prescale 4LW is available in a different roll format (310 mm x 3 meters) compared to the other
measurement ranges of Prescale produced by Fuji Film (the other rolls have a width of 270 mm and are available in different lengths, depending on the measurement range).
Fuji Prescale Film 4LW: Key Features
immediate "mapping" of the distribution of surface pressures;
enables measurements between 0.05 and 0.2 MPa (0.5 to 2 kgf/cm²; 7.25 to 29 psi);
high repeatability of results obtainable in measurement campaigns;
good measurement accuracy (±10% typical, with visual assessment);
availability of optional electronic analysis systems.
Fuji Prescale Film 4LW: Technology Overview
Depending on their measurement range, Prescale films are available in two different formats: single-sheet and double-sheet.
For lower measurement ranges, Fuji Film technology requires the use of two separate sheets (Film-A and Film-C), while for higher measurement ranges,
a single sheet of Prescale is used. The Prescale film with a 4LW measurement range is available only in the double-sheet version.
This double-sheet type consists of a first sheet called Film-A, on which an extremely homogeneous layer of microcapsules
(proprietary PSC - Particle Size Control technology) containing a dye is deposited, and a second sheet called Film-C, on which the dye fixing agent
has been applied.
When the Prescale film is subjected to a surface contact stress, the dye microcapsules will rupture (in proportion to the magnitude of the applied
contact pressure and according to the distribution from the zones actually stressed), causing the dye to be released and immediately fixed by the
chemical reagent present on the second sheet. Thanks to Fuji Film technology, it is possible to produce films with layers of microcapsules characterized
by different and optimizable rupture points during production, thus providing various measurement ranges while ensuring high repeatability and predictability
of the rupture point.
For further information or any doubts, additional useful details can be obtained by consulting the FAQ Prescale
Fuji Prescale Film 4LW: Technical Specifications
denomination: extreme low pressure;
product code: 4LW;
type: double-sheet film;
roll dimension: 310 mm x 3 meters (length);
measurement range:from 0.05 to 0.2 MPa (from 0.5 to 2 kgf/cm²; from 7.25 to 29 psi);
accuracy (*) (**) : typically ±10%;
recommended temperature range: from +15°C to +30°C (from 59°F to 86°F);
recommended humidity range: from 20% RH to 75% RH.
(*) value typically measured with a densitometer, under ambient conditions of 23°C, with humidity at 65% RH; (**) Better accuracies can be achieved with appropriate electronic analysis systems.
Fuji Prescale Film 4LW: Usage Instructions
It is recommended to prepare the Prescale 4LW films well in advance of the test to allow the films, Film-A and Film-C, to acclimate
to the environmental conditions of temperature and humidity in which they will be used.
Unroll an adequate quantity of films for the test, ensuring they rest on a clean, dry surface, preferably with low illumination.
These preparatory actions will allow the films to flatten, simplifying the subsequent cutting and placement operations described in the sequence below.
During these operations (and those that follow), place only the glossy sides of the films on the work surfaces (the matte sides are the ones that,
when combined, will determine the density and distribution of the recorded coloration) to avoid any accidental contact that might affect the films before
the tests.
Cut the Prescale 4LW film to the desired dimensions using a simple pair of scissors. Since it consists of two films
(Film-A and Film-C), make sure to cut both films accordingly.
Ensure that the dimensions are suitable for the area to be tested.
Cut the rubber spacers from Film-A (which are used to space the rolled-up film), and then cut both films to the desired shape.
Given the extremely high sensitivity of the Prescale 4LW, handle it with utmost care to avoid accidentally affecting the films with
contact from fingers, nails, or other objects.
For the reasons previously mentioned, handle the Prescale 4LW with the utmost care and delicacy.
Then, align the two films, ensuring that the cut shape matches for both films. The films should be positioned with their matte
surfaces facing each other (with the glossy sides on the outside). Be mindful of this during the cutting process.
After aligning the two films with their matte surfaces facing each other, place the resulting double layer in the area to be tested.
Then, apply the contact phenomenon to be studied in order to impress the Prescale.
For the methods and timing for reproducing the phenomenon under analysis, refer to the instruction sheet provided.
Evaluate the results of the test using the instruction sheet provided with the Prescale, which includes a colorimetric scale and reference charts.
The film will display the mapping of the contact areas, recording (according to the density of the developed color) the magnitude of the applied pressure.
This can be assessed visually by comparing it with the colorimetric chart provided.
THE FOLLOWING STEPS ARE OPTIONAL AS THEY REQUIRE THE USE OF ADDITIONAL ANALYSIS TOOLS THAT ARE SOLD SEPARATELY.
If more accurate and repeatable evaluations of the results obtained from the Prescale are required, it is possible to scan the impressed films
(e.g., using an Epson™ Perfection scanner) to obtain electronic images. These images can be easily saved, archived, and "historized" (for future comparisons),
and, most importantly, can be analyzed using optional support software.
Once digital scans of the Prescale films impressed by the analyzed event have been prepared, you can use the optional FPD-8010E support software.
This software allows for further analysis, such as evaluating colorimetric results using false colors, rendering of three-dimensional profiles,
calculating the average contact pressure, and more.
See package FPD-8010E for more details.
It is also worth noting the availability of the Prescale Safety Data Sheet and an initial guide to selecting measurement ranges, which addresses various application scenarios, along with the presentation of the FPD-8010E system.:
The Prescale film with a 4LW measurement range has been advantageously used in application scenarios such as the following:
fine-tuning mounting pressures in LCD display assembly systems;
monitoring contact pressures of rollers used in the production of high-performance films;
adjusting contact pressures of laminating rollers;
checking pressures developed during the winding of high-performance films;
fine-tuning contact pressures of vacuum laminators;
controlling pressure distribution in the polishing processes (Chemical Mechanical Polishing) of wafers;
lamination pressures for back grinding & dicing tapes (semiconductor industry);;
optimizing lamination pressure in multi-layer printed circuit boards (PCBs);
adjusting contact pressure of solder paste spreaders on PCBs;
pressure distribution and flow control in the production of fuel cells..
It is also recommended to review the specific section containing the Application Notes
prepared by Fuji Film for the Prescale Film, as well as the additional section Applications in Different Markets,
which summarizes the most significant applications related to various market segments successfully addressed by the Prescale Film.
You are here: products · prescale film 4LW Description: Fuji Prescale Film pressure-sensitive film, suitable for measuring the distribution of surface contact pressures (range 4LW: from 0.05 to 0.2 MPa; from 0.5 to 2 kgf/cm²; from 7.25 to 29 psi).
Prescale Film 4LW
Extreme Low Pressure
Pressure-sensitive Prescale film for measuring the distribution of surface contact pressures, range 4LW: from 0.05 to 0.2 MPa
(from 0.5 to 2 kgf/cm²; from 7.25 to 29 psi)
Fuji Prescale Film 4LW: Overview
The Prescale film with a measurement range of 4LW is one of the recent innovations introduced by Fuji Film Japan, aimed at completing the range of available measurement fields
within the broader Prescale product family, confirming the undisputed maturity achieved by this type of product (previously Fuji Film had already introduced the HHS measurement range),
whose use is now undoubtedly consolidated in numerous application fields.
Responding to specific market needs, primarily originating from the electronics and microelectronics sectors (see examples shown to the side and below), Fuji Film
Japan developed a pressure-sensitive film capable of operating with minimal contact pressures: the Prescale 4LW, in fact, covers all
applications ranging from 0.05 MPa to 0.2 MPa (from 0.5 to 2 kgf/cm²; from 7.25 to 29 psi).
The ability to quickly and reliably check for surface defects in the production of printed circuit boards, verify the correct and uniform application of pressures during semiconductor processing, such as CMP (Chemical Mechanical Polishing) of silicon wafers, etc., has been significantly facilitated and simplified by the Prescale pressure-sensitive film. Although the Prescale film was developed by Fuji Film in the late seventies, numerous additional applications have been successfully addressed by Prescale (see specific sections), and even today, several years after its introduction, new applications continue to be added to the already known ones. The situations in the manufacturing and production sectors that require verification of the correct amount and distribution of applied pressure are numerous, and the ability to control this important parameter also helps extend the operational life of machines and their parts, improving the quality levels of production and, in some cases, even increasing personnel safety. The consistency and stability of the applied pressure, in conjunction with the various production processes that use it, thus enhance the final quality of production by indirectly allowing for the control and improvement of the repeatability of the process itself. The Prescale product range is, in fact, a methodology for study, analysis, and verification that can be advantageously used in the context of surface contact phenomena, without requiring specific skills or particular technical knowledge for its use. The use of the Prescale pressure-sensitive film is very simple, fast, intuitive, and does not require specific preparation; on the contrary, from its first use, the image impressed with the different levels of magenta red will offer a clear visualization of the pressure distribution, which can be interpreted by direct comparison with the reference colorimetric table provided or through more accurate and repeatable electronic measurement means. Numerous studies conducted by authoritative and external parties have confirmed the validity, accuracy, and repeatability of these results, even when compared with other survey methodologies characterized by other technologies; indeed, many production realities have "normalized" numerous internal quality checks based on the use of Prescale film. It is noted that the Prescale 4LW is available in a different roll format (310 mm x 3 meters) compared to the other measurement ranges of Prescale produced by Fuji Film (the other rolls have a width of 270 mm and are available in different lengths, depending on the measurement range).
Fuji Prescale Film 4LW: Key Features
Fuji Prescale Film 4LW: Technology Overview
Depending on their measurement range, Prescale films are available in two different formats: single-sheet and double-sheet. For lower measurement ranges, Fuji Film technology requires the use of two separate sheets (Film-A and Film-C), while for higher measurement ranges, a single sheet of Prescale is used. The Prescale film with a 4LW measurement range is available only in the double-sheet version. This double-sheet type consists of a first sheet called Film-A, on which an extremely homogeneous layer of microcapsules (proprietary PSC - Particle Size Control technology) containing a dye is deposited, and a second sheet called Film-C, on which the dye fixing agent has been applied.
When the Prescale film is subjected to a surface contact stress, the dye microcapsules will rupture (in proportion to the magnitude of the applied contact pressure and according to the distribution from the zones actually stressed), causing the dye to be released and immediately fixed by the chemical reagent present on the second sheet. Thanks to Fuji Film technology, it is possible to produce films with layers of microcapsules characterized by different and optimizable rupture points during production, thus providing various measurement ranges while ensuring high repeatability and predictability of the rupture point.
For further information or any doubts, additional useful details can be obtained by consulting the FAQ Prescale
Fuji Prescale Film 4LW: Technical Specifications
(*) value typically measured with a densitometer, under ambient conditions of 23°C, with humidity at 65% RH;
(**) Better accuracies can be achieved with appropriate electronic analysis systems.
Fuji Prescale Film 4LW: Usage Instructions
It is recommended to prepare the Prescale 4LW films well in advance of the test to allow the films, Film-A and Film-C, to acclimate to the environmental conditions of temperature and humidity in which they will be used. Unroll an adequate quantity of films for the test, ensuring they rest on a clean, dry surface, preferably with low illumination. These preparatory actions will allow the films to flatten, simplifying the subsequent cutting and placement operations described in the sequence below. During these operations (and those that follow), place only the glossy sides of the films on the work surfaces (the matte sides are the ones that, when combined, will determine the density and distribution of the recorded coloration) to avoid any accidental contact that might affect the films before the tests.
Given the extremely high sensitivity of the Prescale 4LW, handle it with utmost care to avoid accidentally affecting the films with contact from fingers, nails, or other objects.
THE FOLLOWING STEPS ARE OPTIONAL AS THEY REQUIRE THE USE OF ADDITIONAL ANALYSIS TOOLS THAT ARE SOLD SEPARATELY.
See package FPD-8010E for more details.
Fuji Prescale Film 4LW: Reference Documentation
It is also worth noting the availability of the Prescale Safety Data Sheet and an initial guide to selecting measurement ranges, which addresses various application scenarios, along with the presentation of the FPD-8010E system.:
Fuji Prescale Film 4LW: Main Applications
The Prescale film with a 4LW measurement range has been advantageously used in application scenarios such as the following:
It is also recommended to review the specific section containing the Application Notes prepared by Fuji Film for the Prescale Film, as well as the additional section Applications in Different Markets, which summarizes the most significant applications related to various market segments successfully addressed by the Prescale Film.
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