What's the use of a sheet of paper on each side of the tray scale?
A weighing apparatus used in a laboratory, consisting of a tray, a beam, a balance nut, a scale, a pointer, a knife edge, a base, a ruler, a rider, weights, etc.. The utility model is made on the basis of the lever principle, each end of the lever is provided with a small cap, one end is weighted, and the other end is placed with an object to be called. The center of the lever is provided with a pointer. When the two ends are balanced, the mass (weight) of the two ends is equal. Is a commonly used weighing apparatus. Accuracy is not high, usually 0.1 or 0.2 grams. The loads include 100g, 200g, 500g, 1000g and so on.
To prevent corrosion of drugs, trays. A sheet of paper can keep the drug and tray free of contact and prevent corrosion. Equal sized paper is placed on both sides in order to ignore the influence of the quality of the paper on the measurement.
To prevent corrosion of drugs, trays. Pad a piece of paper can make the drug tray and no contact, to prevent corrosion; prevent the residual is controversial, since the drug can remain in the tray, it can also be glued on the paper, the exam don't answer; for deliquescent drugs, should be weighed in glass, because the drug ChaoXie stick in the tray, the quality will not be allowed; on both sides of equal size on paper for ignoring the effect of the quality of paper on the measurement. If the paper is made, the paper is to prevent corrosion, and the solution is placed in glassware.
