Premixed and frozen (PMF) refers to plural-component resin systems delivered in syringes and cartridges that are premixed and frozen in dry ice. PMF packages are convenient and reliable, with resins precisely weighed and mixed at the proper ratio, degassed, and flash frozen in a dry ice bath at -80˚C. Syringes from 1-55 cc are the most common PMF packages, but larger cartridges from 2.5-32 oz are also available, as are jars and cans.
After flash freezing, PMF packages are either packed in insulated containers with dry ice and shipped via expedited freight, or they are stored in -40˚C freezers for later shipment. The end user must have a -40˚C freezer available in order to store PMF packages for later production use.