Weights are designed so the specifications on surface finish, markings, construction, material density, and magnetic properties become more restrictive as the weight tolerances decrease in order to enable the weight to maintain its tolerance over time
Precision Analytical Individual Weights are made from the finest materials; manufactured in sizes ranging from 1mg through 50kg Fractional weights 5mg to 500mg are made of stainless steel (30mg weights are aluminum) Fractional weights 3mg and below are made of aluminum Weights 1mg to 2kg are supplied in a high-quality polycarbonate case Used as reference standards as well as calibrating Class I balances as specified in OIML R 76 Used to calibrate Class 1 weights Calibrate certain Class I and Class II balances and scales as specified in OIML R 76 Can also be used to calibrate Class 2 weights