Heads Up Colorant, Pigment, Dye Makers! Are there any of you out there? Here are a couple of great pieces that you need to have. Detroit Process Machinery has just picked up a couple of very nice “Mullers” used for colorant and pigment grinding samples. We have a Hoover M5 Muller and a J. Engelsmann Muller now in our warehouse. Contact us for details, photos and videos. Both of these units are well built and well respected in the industry.