Provided is a system and method for producing resin cartridges that can be used in mine roof bolt applications. The system and method can be used to produce resin cartridges that contain a first portion that includes a resin and a catalyst that cure at a first speed when mixed together and a second portion that includes a resin and a catalyst that cure at a second speed when mixed together. The system can include a base material supply source, a plurality of branch lines, at least one altering material supply line in fluid communication with at least one branch line, a valve arrangement, a product line, and a packaging machine.