An equipment to accurately measure the basis weight (mass) of any substrate to display the reading directly in GSM with high accuracy.
Suitable for Paper / Board / Film / Laminate / Aluminum Foils, etc.
Background / Principle :
The weight (in grams) of a substrate of 1 sq. Mtr area is its GSM (Grams per Sq. Mtr) Hence, the simplest method of GSM measurement is to cut a square piece of 1 meter x 1 meter and take its actual weight.
However, many times it is neither possible nor feasible to prepare and weigh such a large sample size. Hence the second best method of GSM measurement is to weigh a smaller sample (of known area) and multiply the reading by a suitable factor to give you the GSM.
Hence a GSM Indicator is a combination of a Stainless Steel Template (of known / size area) and an accurate weighing instrument (digital balance)