Drop Weight
The glass products of packing are manufactured in IS machines, fed by molten glass from the kiln. At the entry of machine, the glass is cut in little portions, denominated drop weight. Each drop is forwarded for its mold that give rise a new product(bottle, flask, between others).
Being the drop weight variation pointed among the eight causes more commons of defects in glass of packing, the measurement of weight and consequent rejection of each drop weight of glass is crucial.