What is F1 Class Weight Box? When shall we use F1 Class Weights? Which weights shall we use to Calibrate our Weighing Balance?

What are Classes of Calibration Weights? What's the difference between E1 Class & E2 Class? What is F1 Class, F2 Class and M1 Class Weights?

SOP for Operation and Calibration of Analytical Balance.

Ever wondered, how the system of weights in our country has evolved? Was the kilogram standard measure for weighing since earlier times?

What are Standard Weights? How does calibration weights, test weights, standard weights differs? What is the role of E1, E2, F1, F2, M1?