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Texture: Measure and Analyse Properties


Measure Fracturability


Fracturability measurement applications using the TA.XTplus Texture Analyser

CRISPNESS/CRUNCHINESS/BRITTLENESS 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). 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.

BRITTLENESS/FRACTURABILITY is the tendency of a material to fracture, crumble, crack, shatter or fail upon the application of a relatively small amount of force or impact.  It is usually displayed by a product of high degree of hardness and low degree of cohesiveness and is commonly the textural property possessed by baked goods, snacks and generally 'dry' products.

Fracturability encompasses crumbliness, crispiness, crunchiness and brittleness. A material is brittle if it is liable to fracture when subjected to stress. That is, it has little tendency to deform (or strain) before fracture and usually makes a snapping sound.

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 brittle materials and the acoustic signal is as a result of a crack, break, snap or failure of some type.

Fracturability measurement applications using the TA.XTplus Texture Analyser


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

Rupture point, crispness, fracturability, crunchiness, brittleness, fracture strength, fracture distance, work of failure, breaking strength.

The above are only typical examples of fracturability/brittleness 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.

Typical texture analysis graph

Typical Texture Analyser graph 
with annotated properties

 

To discuss your specific test requirements, click here to email us.


 
We can all feel it; let us show you how to measure it – click on the video to see an overview of Texture Analysis and the properties it can measure...

 
Replicating Consumer Preferences


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