What's a good micron # to kief with?

I'm gonna attempt to make a kief extraction device. I was wondering what the recommend micron screen was?? Thanx all!

I haven't done it much yet but so far 120 works well. Good gold color kief.

Kool thanx bud

I like using my 110 the most but basically don't go bigger than 220

What would you say is too small?

I personally wouldn't go smaller than 110 unless it was to clean up my sift. Basically the way it works is.

You use a micron size like 220, if you are happy with it, enjoy it. If you find to much plant matter or you wish to refine the kief into different micron sizes. You would take the kief from the 220 and use say a 150 micron to refine that. Then if you wish to refine that, use the 110. then 90, then 75, then 45. I personally stop after 45 but some do 25 as well.

I've also found out that different strains have different size trichomes.

I second the 110 if only trying to buy one bag. If looking for top notch, scrape at halfway point, then continue until finished. I could get a messload extra by shaking a lot longer (especially w/ dry ice) but at the cost of quality, so I always separate for puff vs. cook.