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Texture: Measure and Analyse Properties


Measure Stickiness


Stickiness measurement applications using the TA.XTplus Texture Analyser

STICKINESS/ADHESIVENESS is the work/force necessary to overcome the attractive forces between the surface of the product and the surface of the material (the probe) with which the product comes in contact.

It is commonly the textural property possessed by confectionery products, cooked pasta products, raw bakery products, pharmaceutical patches and more obviously – adhesives.

TACKINESS is the property of being cohesive and sticky. It does not appear to be referred to in the food industry but there are lots of references in e.g. solder paste measurement for printed circuit board industry.

Stickiness/Adhesiveness is a desirable and sometimes vital characteristic when wishing to stick two surfaces together e.g. for the adherence of coatings, films, attachment of adhesive and medical tapes or drug delivery devices for semi-permanent or permanent applications. However, it can be an extremely undesirable characteristic in such examples of confectionery wrappers attaching to the enclosed confectionery or chewing gum to shoes, furniture etc.

Stickiness is a major problem in the food industry, especially in the baking and confectionery industries, where it can cause considerable difficulty during processing by causing interruptions in production, waste and contamination of machinery. Sticking of food to packaging materials is generally regarded as undesirable resulting in possible packaging material damage, product loss and disfigurement of the product surface.

It can be surmised that the extent to which this could generate adverse consumer reaction will depend on the extent of the sticking, on the type and cost of the product and on the availability of alternative product/packaging combinations.

Stickiness can potentially be both a negative and a positive characteristic of foods. It is an expected characteristic of many foods provided that excessively high levels are not reached, for example in soft cookies, toffees and dried fruit and, in some dishes, such as sticky toffee pudding, relatively high levels are required. Stickiness in foods such as rice can be a positive feature in some cuisines, for example in oriental rice dishes or in Italian risotto, but is regarded as unacceptable in Western cuisine.

In general, however, stickiness finds more usage as a negative term than as a positive term, perhaps reflecting the difficulty in avoiding high levels in some common foods. This can be seen with foods such as rice and pasta, in which even moderate levels of stickiness can reduce product eating quality. This is particularly the case with many sugar confectionery products and with the handling of chocolate products, especially at high ambient temperatures.

Stickiness measurement applications using the TA.XTplus Texture Analyser


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

'Quick Stick', Surface Stickiness & Stringiness, Work of Adhesion - Energy of Adhesion, Stickiness/Adhesiveness, Cohesiveness, Mucoadhesion.

The above are only typical examples of stickiness/adhesiveness/tackiness  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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