Spoilage allowance.

A spoilage allowance is the share of an order a decorator is permitted to misprint, scorch or otherwise destroy without owing the customer a replacement, written into the agreement rather than argued about afterwards. Some of that loss is structural: pieces burned setting registration and color, a press that mis-lays one, a blank whose flaw only shows under heat. Accepted practice in garment decorating sits in the low single digits, and the figure is the contract printer's to state before the job starts rather than a number a customer should assume. The allowance covers goods and not the count, so an order still ships short unless the customer sent overage, and on customer-supplied blanks you may be hunting a size or color that can no longer be bought.