Article: Pigment dispersion and surface defects.(Coatings Clinic)

I have discussed pigment flocculation and considered defects affected by flocculation or poor pigment dispersion in these pages in the past, but this month decided to take a closer look at pigment dispersion and how it influences the occurrence and prevention of surface defects. I am doing this partly because I believe that too many people in the coatings industry take dispersion for granted and do not do enough to optimize the process. I also am concerned that there is not enough realization that the movement to high solids has made it more difficult to let down pigment pastes without hurting dispersion stability.

With the availability of wetting agents, ...

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