Also, measurement containers are often reused and there is almost no possibility to ensure they are completely cleaned between batches with different materials.
Ritchy developed its own unique compounding system that uses a 0.01% precision "state-of-the-art" gravimetric system that automatically drives peristaltic pumps to deliver components into the mixture by weight. Components in use are automatically checked by RFID scanner from the original drums of components. This way the possibility of operator mistake is almost completely eliminated and precision of mixing is better than 0.1%. While there are more companies switching to this approach, it is still relatively unique in the vaping industry and more in line with pharmaceutical standards.