Testing is done at 3 stages:
(1) Raw Material
(2) In-Process
(3) Finished Goods
The essential tests are appearance, taste, odour, mesh size, moisture, ash, acid insoluble ash, volatile oils, active principles, aflatoxins, pesticide residue, illegal dyes & microbial parameters like TPC, Salmonella, E.coli, Yeasts & moulds, Staphylococcus & Clostridia.