clarification on something that i am unsure about
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Thread: clarification on something that i am unsure about

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  1. #1
    us
    May 2019
    Las Vegas
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    Prospecting

    clarification on something that i am unsure about

    the material i run through my 30 mesh screen stops on top of my 50 mesh screen. so is this 50 mesh material or something in the 30 range?

    sorry for the bother, just got to wondering about this.

  2. #2
    us
    May 2009
    Sailor Flat, Ca.
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    50 mesh is what it just went through..so now it "classified" to 50 mesh.

    whatever fits through the 30 mesh..is 30 mesh and so on.
    Clay Diggins, russau and et1955 like this.

  3. #3
    us
    May 2019
    Las Vegas
    62
    56 times
    Prospecting
    so the material that does not go through the 50 mesh screen is still 50 mesh material?

  4. #4
    us
    May 2014
    AZ
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    I would call it minus 30 plus 50 mesh. Take away the 50 screen and it can be simply described as minus 30 mesh. By inserting the 50 screen then what passes that screen would be minus 50.... plus (insert your screen size) etc., etc.
    Last edited by arizau; Nov 25, 2019 at 05:55 PM.
    If it can't be grown, it must be mined!

  5. #5
    us
    May 2019
    Las Vegas
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    56 times
    Prospecting
    on my own i was calling the stuff that did not go through the 50 mesh as minus 50, what goes though is plus 50. bottom line, i was not as wrong as i thought i might be.

  6. #6
    us
    May 2009
    Sailor Flat, Ca.
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    Quote Originally Posted by zemetrius View Post
    so the material that does not go through the 50 mesh screen is still 50 mesh material?
    no its whatever size it was screened through. if your actually grading it there would be the larger grade mentioned.

    I just call what doesn't fit through the screen "oversize" or by the number of the last screen it went through.

    if you have a # 30 # 50 # 100 screens.

    You would end up with Plus 30 , 30 mesh,50 mesh, minus hundred grades You don't need the +/- when that size will get sized again. its just graded by the screen it went through last.
    KevinInColorado and et1955 like this.

  7. #7

    Mar 2016
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    All Types Of Treasure Hunting
    Usually that type of screening would be referred to as #30 minus and then #50 minus.
    As mentioned by GW the last screen it passed through.

    Typical sieve analysis gradations are reported as percent passing a certain size screen.
    Last edited by IMAUDIGGER; Nov 27, 2019 at 09:24 PM.
    Bejay and zemetrius like this.
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