Folding endurance

Folding endurance is a measure of a material's ability to withstand repeated bending or folding without breaking. It's a key indicator of durability, particularly for materials like paper and plastics films that are subjected to repeated stress from folding or bending. 

The test is primarily used for testing papers that are frequently handled such as currency (bank note) papers, maps and wrapping papers. The ageing characteristics of a paper can be assessed by measuring fold endurance before and after accelerated environmental ageing.
Folding endurance testing is performed to the British standard and International standard BS ISO 5626.