How to Efficiently Adjust the Fineness of Grind

As you know, too coarse a grind and you are likely to face issues with your paint color uniformity, gloss and opacity. In the industry, the fineness of grind is generally achieved with a 2-step process, using first a dissolver, then a pearl mill. It usually lasts several hours. Watch this tutorial and learn in a very practical way how you can get faster to the fineness of grind that you want. All you have to do is to use the dissolver phase more efficiently!

By Jochum Beetsma

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Chapters

Welcome

Few Words About Jochum Beetsma

The Dispersion Process

The Dispersion Equipment

Example of the Dispersion of Titanium Dioxide

VIDEO Dispersion of Titanium Dioxide without Rheology Additives

Dissolver Mill Base Without Rheology Additives

How to Adjust Viscosity of the Dissolver Mill Base

How to Select a Rheology Additive

VIDEO Dispersion of Titanium Dioxide with Rheology Additive

How to Check the Fineness of a Dispersion

Summary and conclusions

Watch Online Tutorial

In the industry, the fineness of grind is generally achieved with a 2-step process. First, developers and producers of paints use a dissolver to reduce the particle size of their pigments and fillers to a certain degree of fineness. Then, when needed, they additionally use a pearl mill to further separate the solid particles from each other. This second step is expensive and it’s frequent that it lasts several hours.

Watch this tutorial and let our specialist Jochum Beestma share practical formulation tips to adjust your dissolver mill base and reach faster your targeted fineness of grind.

This video tutorial contains real experiences, courtesy of VLCI - Amsterdam.

Author : Jochum Beetsma

Jochum Beetsma graduated in physical chemistry from the University of Groningen in The Netherlands. He worked at PPG on the development of Industrial Coatings and at DSM Coating Resins on Alkyd Emulsions, Powder Coatings, High Solids, Additives and complete formulations.

Since 2004 Jochum is an independent consultant for companies in coating and ink industry. Multinationals as well as small companies call in the help of Jochum when problems have to be solved or when assistance is needed in New Product Development.

Jochum develops and conducts in-company training programs and he is lecturer within the Dutch Coating Technology training program. Additionally, Jochum is a lecturer of Paint Technology courses for SpecialChem and he is a member of the SpecialChem Expert Team. Jochum writes technical articles for, amongst others, UL Prospector.

Jochum is specialized in the field of New Product Development. He is certified as NPDP (New Product Development Professional) by PDMA, the global leading organization on product development and innovation.

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