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What to consider when performing a powder flowability test?

Together with the complex relationship of internal friction and adhesion between particles, the fluidity of powder cannot be expressed by a single physical property value. However, the fluidity of powder has a great influence on the weight difference of granules, capsules, tablets and other formulations, and is an important link to ensure product quality. There are many forms of powder flow, such as gravitational flow, vibrational flow, compressive flow, fluidized flow, etc. The corresponding evaluation methods of flowability are also different, and when measuring the flowability of powder quantitatively it is better to use the method corresponding to the processing. I would like to know what factors should be taken into consideration when I perform a powder flowability test in our lab.

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