GSM and Thread Count in Bag Fabrics: What the Numbers Actually Predict
Bag buyers compare specifications using two numbers, and the two numbers describe different things. GSM tells you how much a square metre of fabric weighs. Thread count tells you how many yarns are packed into a given length. Neither, alone, tells you how strong or...
Bag Base Boards and Reinforcements: What Keeps a Tote Standing
Two canvas totes with the same fabric and the same dimensions can behave nothing alike. One stands open on a counter, holds its shape when half full, and packs flat for shipping; the other slumps the moment it is set down. The difference is rarely the canvas. It is...
RF Welding and Ultrasonic Sealing for Bags: Where Sewing Stops
Not every bag can be sewn. A leak-proof cooler bag, a waterproof dry bag and a medical pouch with a film window all need seams that thread cannot deliver, because a needle makes holes. The alternatives are RF welding and ultrasonic sealing, and they behave differently...
Water-Repellent Finishes on Bags: What Coatings Do and When They Wear Off
Water-repellent finishes sell bags in hardware stores and disappoint them in downpours, usually because nobody specified what the finish was supposed to do. Repellency is not waterproofing, finishes wear with use, and different coating chemistries suit different bag...