Food | Yield Point Determination of Dairy Products

How to measure the yield point of yoghurt and sour cream with the rotational rheometer RheolabQC. This report describes the advantages of shear stress deformation method over flow curve analysis.

To make a material flow, the external forces applied to this material have to overrule the materials inner structural forces. The point where this happens is called the yield point of a material (also referred to as yield stress or yield value). The yield point is a measure of the shear stress required to make a material flow.

Many products used in daily life show a yield point, e.g. toothpaste, creams or ketchup. As, for instance, nobody likes his toothpaste to run out of the tube uncontrollably, determining the yield point is of great importance for practical use.

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