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I often buy shelled hemp seeds, but there is still a lot of hull in the bought product. No manufacturer sell hemp seeds perfectly shelled (only hemp hearts). You can see the typical product on the picture.

enter image description here

Could you recommend some home-made easy method how to filter (or separate) the hemp hearts (white on the picture) from the hemp hulls (green and black on the picture)?

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  • Are you using them for culinary or horticultural purposes? – Stephie Feb 22 '16 at 14:15
  • It looks like there's at least one manufacturer that sells hearts only : smile.amazon.com/dp/B00AR82UNA – Joe Feb 23 '16 at 16:38
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Dry? If so, rolling down an inclined plane, such as a big handheld cutting board into a washing tub should work. The rounder seeds will roll, while the husks remain stuck. Pour in a thin steady stream. Broken seeds will likely still roll, as they've still got bounce to them, while the hulls do not.

Wet? Stirred flotation is likely your best option. Hulls have a larger surface area to mass ratio, so you can stir them right over the sides of a pot with water running into it.

Neither method will give you 100%. To approach that, you need to repeat the process.

  • This is easy to say, but can you post pictures of videos about your success? – xralf Feb 23 '16 at 14:31
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    Nope. I haven't done it with hemp seed. However one or the other technique works for oats, sunflowers, garbanzos, Bok choy seeds, etc. etc. They're fairly standard separation processes in the food industry in cases where sieving won't do the job. They work fine at home for moderate sized batches, but if you're talking 50Lbs or something, it's time to search the old patent literature to find out how they did these things in say 1883. Many of those old techniques are easily adaptable to medium scale in the modern day. – Wayfaring Stranger Feb 23 '16 at 14:38
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    @WayfaringStranger : some of them used 'shake tables' with groves in them to catch one of the items, so you could separate things out. There's also winnowing by wind : a tarp is spread out on the floor of a barn, and doors opened on either end to allow air flow. Grain is then poured from the upper level onto the tarp, with the less dense items being blown further from the heavier items. See also en.wikipedia.org/wiki/Winnowing – Joe Feb 23 '16 at 16:46
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    @Joe I actually tried making one of those shake tables with grooves for separating oat groats vs oat groats with hull attached. No joy at a scale you can reasonably expect to build in your basement. I've got a bigger variable speed fan now, and may try the wind method on oats to better success soon. A fan and a sheet for winnowing: en.wikipedia.org/wiki/Winnowing might work nicely for hemp seed. That's best done outdoors. – Wayfaring Stranger Feb 23 '16 at 16:53
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We can easily remove the skin of black gram.

Soak it for long hrs like 5 to 8hrs.

6 hrs is enough.

wash them no of times like we wash rice.

Mix them with hands & just rub them while mixing

same as rice washing.

do it no of times, then it will go

u can find just 5, 6 black skins.

That u can remove by hand.

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    Thank your for the answer. Do you think like this? youtu.be/cUmHQtiaaoQ I will give it a try, but wonder if only hemp hearts will remain. – xralf Mar 5 '16 at 0:31
  • yes.. south indian food idly. liquid preparation method. so many times try this same way. – Vaishu Mar 5 '16 at 7:55
  • This does not work at all. – xralf Mar 7 '16 at 8:04

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