This means that 2.5 : 1 pitch coil can be used to bind documents that are thicker than any of the other pitches of spiral coil.
12.
However, other features in the flow, such as spiral coils similar to terrestrial lava coils, are indicative of a volcanic origin rather than a glacial origin.
13.
This makes spiral coil binding an excellent choice for marketing agencies and design firms that want to match the spine of the document to a specific color palette.
14.
It consists of two flat spiral coils suspended vertically facing each other, hinged at one side so one could swing away from the other to an angle of 90?to reduce the coupling.
