We control quality by test on propolis content, flavonoids, heavy metal, antibiotics, pesticide residue, PAHs, etc in our lab., also help our customers to perform sample analysis, third party test agencies (such as INTERTEK, EUROFIN) results comparison, and product quality statistics and analysis, etc. JET air pulverizer is operated to ensure the fineness of the propolis powder, the temperature during the process of the output materials, then to reduce the risk of caking.