What is the hardness test for capsules?

"Tablet hardness" is a measure of the force required to break a tablet in a test apparatus that places the tablet under a tension or bending load. The hardness of a tablet plays a crucial role in its efficacy and overall performance, especially during packaging, shipping, and patient use. It is also an essential aspect of tablet quality control.

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Measurin&#;g tablet hardness

Hardness testing is an essential aspect of quality control in pharmaceutical industries. In this process, a load is applied to the tablet and the force that causes the tablet to break, known as the 'hardness', is measured. The units of hardness testing are kilograms (kg), Newtons (N), or kiloponds (KP).

Types of hardness tes&#;&#;ters

There are mainly two types of hardness testers: manual and electronic. The manual hardness testers require individual placement of each tablet and manually recording the results. Electronic testers automatically measure and record the hardness.

While both manual and electronic testers serve the same purpose, electronic testers are seen as superior, owing to their improved precision, repeatability, and reduced error rates. They also save time by rapidly testing large numbers of tablets and provide digital recording and data export capabilities.

When selecting hardness testers&#;, it is crucial to consider factors such as accuracy, reliability, ease of operation, and cost-effectiveness. 

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Interpreting hardness test &#;&#;results

Interpreting hardness test results involves evaluating the breaking force against a pre-established acceptable range specific to the tablet formulation. If the hardness is within the defined range, the batch passes the test. If the hardness falls outside the range, the batch the formulation or manufacturing process should be re-evaluated.

Pharmaceutical tablet hardness testing (or more correctly known as diametral/diametrical crushing strength) is a way of measuring the quality of tablets. Merlin uses tablet hardness testing to calculate the tensile strength of tablets to assess the manufacturability and compactibility of formulations.

This is an add on test for our compaction studies.

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