Abstract
Our company produces the granule products from herb extracts. The granules are produced by a dry granulating process including press molding, crushing and classifying processes. The granules require a certain nextent of hardness and fragility to meet the specification also make the pills easier to swallow. Granules are difficult to dissolve if too hard, and become powdery if too soft. ln the current measuring method, granules are vibrated then the powder is separated by screening. After then, the amount of powder which is remain on the screen are measured to indicate the hardness. But this method takes time and the measurement error may be high. This paper reports the development of new method with a short measuring time and high precision.
