![\"How](\"https:\/\/www.powdermachines.com\/wp-content\/uploads\/2026\/10\/How-to-Prevent-Pigment-Segregation-in-a-Powder-Coating-Mixer_inline_1.png\")
<\/figure>\nWhy Does Pigment Separate After Mixing?<\/h2>\n
Coarse resin leaves gaps in the powder bed. Shake that bed and loose fines may find their way through. Pour it from a height and the particles can separate along their different paths. The size difference is often important; density alone doesn’t tell you which way a particular blend will separate.<\/p>\n
Then there is the batch that was never properly mixed. Pigment caught in a clump by the wall has not suddenly segregated on its way out. It was there all along.<\/p>\n
Dry premixing gets the ingredients distributed ahead of melting. It doesn’t replace pigment dispersion during extrusion<\/strong><\/a>, where stubborn agglomerates may need further work. These are different faults, even when both end up on the desk as a color complaint.<\/p>\n Watch what happens when the bags go in. Both the placement of a small addition and the volume of the whole charge deserve attention.<\/p>\n A little bag of tinting pigment is easy to lose in a large charge. Pour it into a corner and you have given the machine a pocket of concentrated color to deal with. Try distributing it through a weighed portion of the recipe resin before it goes into the main batch. Write down where that preblend enters the loading sequence so another operator can repeat the trial.<\/p>\n Take that carrier out of the resin you have already weighed for the batch. Adding a fresh scoop on top would quietly change the formula.<\/p>\n Check bag residues as well. Material left in a folded liner never reaches the mixer, however long the machine runs.<\/p>\n Here is an easy trap when changing formulas. You weigh the usual 100 kg, but the new blend has a loose bulk density of 0.40 kg\/L instead of 0.50 kg\/L. Divide the weight by those densities: yesterday’s charge needed 200 L; today’s needs 250 L. You have put 25% more volume into the vessel without adding a kilogram.<\/p>\n For the CMR-300 miscelatore contenitore<\/strong><\/a>, allow 240 L of working capacity within the 300 L container. The 250 L charge in this example is already over that working figure. The empty space above a batch has a job to do.<\/p>\n Check the new blend’s bulk density before carrying over an old batch weight. This is particularly useful when the material looks noticeably fluffier on opening the bags.<\/p>\n \u201cAnother minute, just to be sure\u201d is a poor substitute for a mixing trial.<\/p>\n Run a comparison with the same charge at different durations. Leave speed and loading order alone for that trial, or you won’t know which change helped. Put the discharge temperature beside each result in the batch record. Does a longer run actually remove the pigment pockets? Does it just deliver warmer powder? You need that distinction before settling on a time.<\/p>\nHow Should You Load a Powder Coating Mixer?<\/h2>\n
Give Small Pigment Additions a Carrier<\/h3>\n
Check Liters and Kilograms<\/h3>\n
When Should You Stop the Mixing Cycle?<\/h2>\n
![\"MPMtek](\"https:\/\/www.powdermachines.com\/wp-content\/uploads\/2026\/10\/How-to-Prevent-Pigment-Segregation-in-a-Powder-Coating-Mixer_inline_2.jpeg\")
<\/figure>\n