It depended on which brands of floppies you bought. Some vendors were more profit-oriented than others and would skimp on the binding agent or just the amount

It depended on which brands of floppies you bought. Some vendors were more profit-oriented than others and would skimp on the binding agent or just the amount of magnetic material without which the signal can become so weak they could become corrupted by being the the same room as a Wooly Willy.