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What are some ways to measure plastic film thickness?

A:

Quick Answer

The most accurate form of measuring plastic film thickness in common industrial use is by using one of a range of infrared spectroscopy methods on a sample of the film. These include measurement by transmission, attenuated total reflection, specular reflection and infrared microscope methods.

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Full Answer

Standard infrared spectroscopy methods assume the availability of an appropriate sample of the film in question. For items in use, or which cannot otherwise be sampled normally, a much smaller sample scraped off with a silicon-carbide sampler undergoes measurement of the infrared spectrum using a diffuse reflectance accessory. Commercial gauges use a range of these tests to provide the appropriate measurements, but producers must ensure that they are using the right tests for their product's composition and end use.

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