How to Measure Crispness and Crunchiness

Abrasion measurement applications using the TA.XTplus Texture Analyser

CRISPNESS/CRUNCHINESS is a property manifested by a tendency when subjected to an applied force to yield suddenly with a characteristic sound. It is commonly the textural property possessed by snacks (potato chips), breakfast cereals, fresh fruit and vegetables and some baked products (biscuits, crackers). This property can be measured during break strength testing.

These types of products are usually associated with sharp triangular curves displaying an obvious break point (when tested individually) or produce a 'jagged' multi-peak curve when tested 'in bulk'. The number of peaks produced are as a result of the fracture events that have occurred during the test. Counting the number of force peaks, the average dropoff and measuring linear distance are common calculations applied to such curves. Crispness is usually associated with many small fracture peaks. Whilst a crunchier product may possess the same number of curves the drop from peak to trough will be significantly higher and the linear distance increased accordingly.

The Acoustic Envelope Detector can by employed for any material which produces an audible noise when tested as it captures another dimension (i.e. sound) during the test which can also be analysed and used as a measured product feature. This is usually for acoustic analysis testing of brittle materials and the acoustic signal is as a result of a crack, break, snap or failure of some type.

Acoustic output measurement using the Acoustic Envelope Detector

Typical properties that can be obtained from a texture analyser graph:

Rupture Point, Crispness, Fracturability, Crunchiness, Brittleness, Fracture Strength, Fracture Distance, Work of Failure, Breaking Strength
Typical texture analysis graph

Typical Texture Analyser graph with annotated properties of breakfast cereal bulk compression

Typical Probe/Fixture used for Measurement:

Single pieces of homogenous product:

Three Point Bend Rig >>
Knife Blades >>
Small Cylinder Probes >>

Multi-particulate or non-uniform products:

Ottawa Cell >>
Kramer Shear Cell >>


The above are only typical examples of crispness/crunchiness measurement. We can, of course, design and manufacture probes or fixtures that are bespoke to your sample and its specific measurement.

Once your measurement is performed, our expertise in its graphical interpretation is unparalleled – no-one understands texture analysis like we do. Not only can we develop the most suitable and accurate method for the testing of your sample, but we can prepare analysis procedures that obtain the desired parameters from your curve and drop them into a spreadsheet or report designed around your requirements.

Show me more properties that a Texture Analyser can measure...

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Texture Analysis probes

Probes and attachments

The Texture Analyser uses a range of different probes and attachments according to your specific application.

Exponent Software


Whether you require a simple test and data analysis solution or a fully featured software package – we give you the choice.

Peltier cabinet

Temperature Control

If your product is temperature sensitive, we have a range of temperature monitoring and control options.

Acoustic Envelope Detector setup

Additional measurement options

By attaching peripheral devices you can collect additional measurement parameters during your standard texture analysis test.

Automated Linear Indexing System


Find out how to increase your sample throughput, walk away time and testing efficiency with several automation options.

Loadcell in case


Our range of Texture Analyser accessories covers requirements for the use, maintenance and protection of your instrument.

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