What Is GSM? How Quadrant Scales Are Significant In GSM Testing?
GSM stands for Grams per square metre is a crucial unit to measure the weight of the paper. It represents the weight of 1 square metre of paper in grams. In both the paper and packaging industries, the role of GSM is undeniable. A sample cutter is used to prepare the specimen, which is then tested on a GSM tester to find the basis weight. The GSM of a paper depends on several things. The most common are: The type of fibre Fibrillation process The length of the fibre Fillers, pigments, as well as coatings on the paper. Calliper or thickness (the thicker the paper, the higher the GSM) The process of drying and pressing the paper. Moisture content in the paper Consistency Calendering of the paper, The application for which the paper is made When it comes to calculating the GSM of the paper, a quadrant scale does not play a direct role. In other words, one cannot measure the GSM directly on the quadrant scale. It is, in fact, measured on the GSM testing machine, by prepa...