Hockmeyer Equipment Company agrees that moving a product through the media field as many times as possible gives the overall particle distribution a much smaller standard deviation, and this is why immersion mill technology was developed in the first place. In the process of recirculation milling, the media field is attacking larger agglomerates and turning them into smaller agglomerates or aggregates. As the agglomerates become smaller, the rate of attack or the efficiency of the media starts to decline. Once the particles become 1000 times smaller than the media, the efficiency is very low. When this happens, most of the work going on in the mill is centered on the larger agglomerates hidden in the larger volume of smaller particles or agglomerates. Larger agglomerates need to be exposed to the media field as many times as possible to eliminate them. Historically, the entire batch needs to be recirculated through the media field anywhere from 10 to 15 times before the batch is considered to be complete, or the media has become inefficient. Passing the batch through the media field will continue to reduce the particle size at some rate, but the return on the investment of power to run the mill and wear on the components outweighs the increased physical characteristics of the material being milled. The solution to this, is the increase the number of times the batch passes through the milling chamber without increasing the amount of time the mill has to operate. This is where the NexGen recirculation mill stands out above traditional milling equipment. The NexGen mill has one of the largest screen open surface area to media ratio on the market, which allows an incredible amount of material to be pumped through the media field in a very short amount of time.