STMC stands for the Standardized Test Methods Committee. This global committee formed to find and promote standardized test methods for the printer cartridge industry. The test methods are used to evaluate printer cartridge performance. Standardized test methods make it possible to evaluate a cartridge anywhere and come up with the same test results no matter who tests it. Standardized tests do not specify how a cartridge must perform; they only measure it.

A company that is STMC certified is one that has had their employees successfully trained in the use of specific test methods. The results of these tests demonstrate that the cartridge performs well in producing the maximum number of pages and optimal toner application on those pages. The companies that are STMC certified are committed to making the best printer cartridges available.