The sieve was then shaken for 5 min manually. The
weight of the powder remaining in the sieve was measured. The degree
of caking (DC) was calculated by the following equation:
Degree of caking ¼ ð Þ c=d 100
where d (g) is the amount of the powder used for sieving and c (g) is the
amount of the powder left on the sieve after sieving.