How to measure dispersion using Elcometer Fineness of Grind Gauges

To measure the dispersion (or measure the particle size) of a material, a fineness of grind gauge, also known as a grindometer, is used.
CONTENTS
0:49 Elcometer's Fineness of Grind gauges
2:16 How to complete a test
3:41 How to read the result
Elcometer precision manufacture and supply three different types of fineness of grind gauges, or grindometers.
Dual channel gauges, such as the Elcometer 2020, which are available in various scale ranges, and are ideal for testing the dispersion of many materials including paints, coatings, cosmetics, chocolates, and other similar products.
The Elcometer 2020 gauges are available with either mil or micron scales; and include two other scales as standard - the PCU (North) scale where your material is compared with a known sample, and the NS (Hegman) scale which reports the distance from the deepest end of the channel.
Dual channel gauges also allow you to test different material formulations side-by-side, so you can instantly compare the results.
Alternatively there are high precision single channel grindometers, such as the Elcometer 2050, available in either mils or microns. The combination of the same depth, that’s precision ground across a longer channel, means the Elcometer 2050 allows you to measure to a greater accuracy, of ±1μm (±0.04mil).
And the NPIRI Fineness of Grind gauge, the Elcometer 2070, precision made for determining dispersion in printing inks according to the National Printing Inks Research Institute scale, as well as either mils or microns.
This video will guide you through how to measure dispersion using a grindometer / fineness of grind gauge / Hegman gauge.
For more information on Elcometer's range of fineness of grind gauges, contact Elcometer at [e-mail] or visit our website at www.elcometer.com/en/coatings...
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Click here to download the video script in English: www.elcometer.com/pub/media/P...
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STANDARDS
Elcometer 2020
ASTM D 1210, AS/NZS 1580.204.1, DIN 53203, EN 21524, FTMS 141 4411.1, ISO 1524, JIS K 5600-2-5, NF T30-046
Elcometer 2050
ASTM D 1210, AS/NZS 1580.204.1, DIN 53203, EN 21524, FTMS 141 4411.1, ISO 1524, JIS K 5600-2-5, NF T30-046
Elcometer 2070
ASTM D 1316

[@hamzabutt7119]

Excellent video, very informative. I especially liked 3:49 where the gentleman showed the precise angle to view your results from.
Great work!

[@rathodajit349]

Thanks

[@Entertained123]

Awesome video, its exactly what I was looking for. Which test method is this from if I may ask?

[@ElcometerOfficialChannel]

Hi,
Thank you for the kind words! The test methods used in this video are from the ASTM, Delta 1210 standards. This is the standard test method for dispersion of pigment/ vehicle systems by Hegman Gauge.

[@Entertained123]

@@ElcometerOfficialChannel thank you

[@MJPlays2510]

Hi, would you say the result is more d(90) or d(50)

[@ElcometerOfficialChannel]

Thank you for your comment.
This gauge is designed to indicate the size of particle within the paint and as we are unable to assess the number of particles we cannot assess particle size distribution and therefore ascribe a d-value to the reading.
What we would suggest is that as there is less evidence of any coating once the prescribed 5 to 10 streaks are observed, then most of the particles can reasonably be assumed to be bigger than the value obtained, and hence we would suggest the reading is nearer to d(50) than d(90).
If you have any further questions please contact [e-mail] or visit www.elcometer.com/contact-us to find your local Elcometer distributor.

[@MJPlays2510]

@@ElcometerOfficialChannel Thank-you for your reply. I assumed it was closer to d50. 😀