Firmness is defined in this method as the force (in grams, kilograms or Newtons) required to compress the product by a pre-set distance (i.e. force taken at 25% compression of 25mm) (AACC, 1983). A 25% compression of 25mm thick sample = 6.25mm compression distance at which point the compression force value (CFV) is taken. Units displayed can be converted automatically according to requirements and are not restricted to the units used during the test. Examples of the use of this type of test is in the determination of firmness of bread samples according to storage time or the effect of change in flour type. Clearly sample B is firmer than sample A.