Some friends have inquired about the LLW model of pressure-sensitive paper. In fact, LLW is the same as 2LW, which is just another way of referring to the same standard model. The official model is LLW, commonly called 2LW or 2L.
When asking about the LLW comparison table, it essentially refers to the pressure testing range—that is, the range of pressures this model can measure. The model of pressure-sensitive paper is determined based on this testing range.
Pressure testing range of LLW (2LW) pressure-sensitive paper:
0.5 MPa – 2.5 MPa
This means that any measurement within this pressure range can use this model of test film. Pressures above or below this range are not suitable. The specific products that can be tested are numerous, so they are not individually listed—just use the pressure range as the guide.
In short, when selecting pressure-sensitive paper for testing, first check the pressure range of your product, and then choose the corresponding model—this will ensure proper measurement.
Features of LLW Pressure-Sensitive Paper:
Convenient and intuitive way to check the distribution and uniformity of applied pressure.
Different color densities correspond to different applied pressure values; the pressure value can be determined using the standard pressure-density curve.
Fast measurement with clear, direct visualization of the pressure pattern after application.
Standard Pressurization Conditions:
Continuous Pressure: Gradually increase the pressure over 5 seconds to the set value and maintain for 2 minutes.
Instantaneous Pressure: Gradually increase the pressure over 5 seconds to the set value and maintain for 5 seconds.
This concludes the introduction to the LLW (2LW) pressure-sensitive paper.
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