there should be super careful weighing with, and without the packaging. i'm too lazy to ask my wife who'd know, but i believe that for tracking purposes they include the paper. for sentencing purposes they sample the paper in a couple of places, work out average concentration, and then math math back from there to whatever number is necessary.
going up in weight (by more than the uncertainty of the scales' measurement) is going to be a hell of a lot more interesting to anybody who actually cares, since that can't happen in the normal course of testing. certainly going down is what implies diversion, but it is also necessary for testing purposes.
going up in weight (by more than the uncertainty of the scales' measurement) is going to be a hell of a lot more interesting to anybody who actually cares, since that can't happen in the normal course of testing. certainly going down is what implies diversion, but it is also necessary for testing purposes.