The manufacture of balloons involves precision cutting of panels which can be on a very large scale.
Hot air balloon envelopes range in size from 30,000 to as much as 140,000 cubic feet in capacity.
The enormous panels of 1.1 to 1.9 oz fabric have to be precision cut and sewn for the shape of the balloon to be smooth and consistent.
With the advent of specialist promotion balloons in complex shapes, the difficulties of cutting precise panel shapes has become even greater.