With regards to KRUVE; for nearly a decade now, we used their coffee sifter as a primary tool in our lab for identifying particle sizes created by various grinders.
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With regards to KRUVE; for over a decade now, we used their coffee sifter as a primary tool in our lab for identifying particle sizes created by various grinders. It was a laborious task, but gave consistent results and allowed me to create a proper database of particle size comparisons over time. Nothing else existed (at least under $5K) to do this.
(today, I use a digital particle size analyser from DiFluid, which only came available last year).
I also used the KRUVE sifter for many of my press pot coffee brews. In that instance, it is quick and easy to do, letting me sift off any particle sizes below 600um, for a much cleaner press pot cup. It's one of my fave "stealth" ways to brew coffee.
Here's my OG Kruve sifter. I'm on a second unit now (my OG got damaged when we moved in 2017).
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@coffeegeek Do you have a guide for the Kruve? I don't know if I'm using mine correctly.
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@lambtor No I don't, but that's not a bad idea for us to publish one.
The shaking technique is paramount; I do 20 secs horizontal shaking, 10sec vertical shaking, and repeat. 1 min total. Then a couple of knocks / raps to do the final settle down of the grinds.
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@coffeegeek Is it more or less depending on how much coffee you have in there? Do you have an estimate on what % of grinds you'd expect to lose after the sift? Clean filters after each use? I've been keeping the microfines in a small jar after sorting, but I have no idea what to do with them.
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@lambtor When used for brewing sifting, I do usually 20% more than my final intended use (so for a 3 cup press, I will do 25g instead of 21g).
For our grinder particle size tests, I do 10 AND 20g samples, and average across both. it's labourious, but fairly accurate.
