Fines Below 150 Microns: The Hidden Tonnage in Every Bulk Bag You Unload

A hygiene convertor in Southeast Asia opened a 1,000 kg bulk bag and found 38 kg of it would pass a 150 micron screen. Nobody had asked for a fines limit in the purchase order, because nobody had thought fines were a specification. Six months later the converting line was running 4 percent slower, t…