Tobacco materials are damaged and gradually broken by external forces in manufacturing machinery and equipment through the entire process. Recently, since the speed of equipment has been faster, the level of tobacco materials breakage has become higher. The only way to know the level of breakage was to measure the mean diameter of tobacco materials in the actual production process. The authors of this study have established the theory of estimating tobacco materials breakage in order to develop new equipment to reduce breakage. Also, we have verified this theory by a table test.

The theory is as follows:

W = C log (D_{before; Dafter})

   W: External energy provided to tobacco materials in the process
   C: Coefficient determined by the tobacco materials characteristics
   D_{before; Dafter} : mean diameter before and after the process respectively.