GSM in relation to paper - is the weight in Grammes of one Square Metre. For example - 'regular' A4 copier paper is usually 70 GSM. Craft paper such as origami paper (for folding into models) is usually much lighter at around 40 GSM, or sheets of card is normally 120 GSM
bs of the paperx1000/gsm of the paper=bf of the paper
cut 10x10 cm paper then check the weight of paper on gram. GSM is (weight of paper (W) divide by 0.01)
According to CK PAPER MART, Sac Kraft paper is considered as best for developed twisted paper rope as this craft paper is little stretchable and does not get tore out when the paper is twisted. The best GSM is considered to be between 40 GSM to 70 GSM depending upon the types of Kraft Paper. Later on, twisted paper rope is used to manufacture carry bag handles.
Kraft paper.
According to CK PAPER MART, there are different types of Kraft paper manufactured by Paper Mills, such as Virgin Kraft, Bleach Kraft, Poly Craft, Absorbent Kraft Paper, etc. and these kraft paper are used for different types of packaging materials such as carry bags, corrugated boxes etc.
The standard RCT (Ring Crush Test) value for 180 gsm, 18 bf kraft paper typically ranges between 2.5 to 3.5 kN/m, depending on the specific manufacturing process and quality of the paper. RCT values can vary based on factors such as moisture content and the pulp used in production. For precise values, it's best to refer to the specifications provided by the manufacturer.
yar, BF means Burst factor it is a measurement used for testing the paper strength. an equipment is used namely BF tester by which it is tested. If higher the BF strength will be high. How testing : mechanism is that we are passing some kind of air through the whole on which paper is put and check in what preassure the paper brokes and multiples the value with one squr metre of the said paper. the value will be BF. For corrugating industry strength of box is very much related with BF and GSM (one sqr meter weight) variety of BF & GSM combination used for strengthing the boxes. suresh from Sree Sakthi PAper mills LTd Manufatures of KRaft Paper 14 BF to 40 BF in a range of 80 Gsm to 450 Gsm. and Dublex Colour boards with variety of colours(shades)
The unit 'gsm' stands for 'grams per square meter', which means that a 130 gsm paper is heavier than an 80 gsm paper. Whether the 130 gsm is thicker depends on the type of paper. However, 130 gsm of the same paper stock would obviously be thicker.
Ring crush test of kraft paper
170 to 230 gsm paper used for paper plates and cups
How to calculate gsm for cartons
GSM stands for grams per square meter, which measures the weight and thickness of paper. A higher GSM indicates a thicker and more durable paper, while a lower GSM indicates a lighter and more flexible paper. The GSM of paper can affect its quality by influencing factors such as durability, opacity, and print quality.