The Cretors’ Metric Weight Volume Tester duplicates normal popping conditions with all variables tightly controlled. Popcorn processors and retailers are able to compare the expansion of various samples of popcorn to ensure corn quality, and determine corn expansion and performance.

The original volume tester was originally developed in 1952 by Cretors to test the quality of popcorn that was being provided by corn processors. In 1972, the MWVT was developed with counsel and input from the Popcorn Institute. Detailed instructions are developed by the Popcorn Institute and must be followed for results to be considered valid.