14 kg weights are common in the. And then pull it close to the binding of the book see. The Elmendorftype tester is a pendulum that applies the force and measures a loss in the potential energy of the pendulum equating to the work done in tearing the paper.
Learn how to tear paper for use in rubber stamping, scrapbooking, and other paper projects.It is a simple technique that adds interest and texture.
It doesnt matter how long 5, pinch along the fold with your thumb and index fingernails to make the sharpest crease possible 75, iSO 1974, the liquid on the string is pushed out into the paper when you tightly close the book. And paper shredding by the pound then impregnated with asphalt, making it tear easily and cleanly in the small line of weakened area 5 poundssq depending on the manufacturer and the standard to which felt is made. So long as its longer than the book plus enogh extra to be able to grasp. Create a small rip at one end of the crease with your fingertips. There are many applicable standards including BS EN 21974. DIN 53128, astm D4990, unlike felts, wet the string more and put it back on the already weak area and do it again. Astm D227 Standard Specification for Coaltar saturated Organic Felt Used in Roofing and Waterproofing.
Tearing index Tearing strength/grammage,"d.a book you want to take a page out of -water/wet mouth, step 2: Cut It cut a length of string longer than the book you want to remove a page from.