Presto’s round cutter is mainly used for precise circular cutting to check the grammage of samples. The cutter cut out the specimen of 100 cm2, which is exactly equals to 1100th of a square meter accurately and rapidly. The result is in grams when multiplied by 100 gives the GSM directly, i.e. gram per square meter. So we can say that, GSM = Sample Weight in Grams x 100 GSM round cutter is equipped with 4 knives. By rotating the knob quarter a turn, the cutter will provide you the sample of 100 cm2.
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