Table 1. Classification of powder flowability and cohesiveness based on Carr index (CI) and Hausner ratio (HR)

	Classification
CI (flowability)	<15	Very good
	15–20	Good
	20–35	Fair
	35–45	Bad
	>45	Very bad
HR (cohesiveness)	<1.2	Low
	1.2–1.4	Intermediate
	>1.4	High

CI, Carr index; HR, Hausner ratio.