Für dieses Produkt existiert zur Zeit nur eine englische Produktbesschreibung:

The Tumbling Weight Loss Test determines wether crown closures, due to abrasive wear, contribute excessive amounts of dust which could contaminate the bottled beverage.
A certain number of crown closures is weighted, „tumbled“ and weighted again. The loss of weight is the mass of the generated dust.

Functional description:
The crown closures are tumbled over top for a certain time, causing abrasion. This test simulates the condition of unsorted storage during transport and feeding.