Rock or Metal?

Discussion in 'Sharpening Station' started by MindTone, Jul 10, 2019.

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  1. Jul 10, 2019 #1

    MindTone

    MindTone

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    So, now that I've made these goodies
    DSC_0281.JPG
    I'm left with a bit of extra gravel :p
    DSC_0283.JPG
    My thought is to get a mortar and grind it super fine so I can use it for polishing. The question then is should I get a metal or stone mortar? I don't want to end up with anything extra in my powder that'll scratch my knives and I'm not sure which sort is best to avoid this?
     
  2. Jul 10, 2019 #2

    childermass

    childermass

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    Nice lot of finger stones!
    I don’t think that it does really matter. A stone mortar should be made of granite and be way harder than the Uchi and a metal mortar will most likely be made from brass or any other soft metal and should not harm the steel in any way.
    That said a stone mortar will be more universal in use for other things than producing jnat powder.
     
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  3. Jul 10, 2019 #3

    nutmeg

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    One day I would try in a Thermomix witch much water.

    Anyway you have to sieve it very fine after this.
     
  4. Jul 11, 2019 #4

    Kippington

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    I'm guessing it would matter, judging from your description alone. If you smash the abrasive in a stone mortar and two bits of granite grind up against each other, you'll probably find bits of it through your polishing compound.
    I'd feel sorry for the Thermomix blades. May as well go all in and use a Pacojet! :D
     
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  5. Jul 11, 2019 #5

    Nemo

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    Kasumi thermomix blades?

     
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  6. Jul 11, 2019 #6

    nutmeg

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    or a Microplane.. ;)
     
  7. Jul 11, 2019 #7

    valgard

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    The title of this thread made me think it was a decision between buying a knife or a stone
     
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  8. Jul 11, 2019 #8

    lowercasebill

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    Just thinking out laud but...
    Plate steel or anvil or side of sledge hammer and a hammer?
    Tap tap tap till you get what you want.
     
  9. Jul 11, 2019 #9

    McMan

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    Crushing is the least of your worries... just use any hammer on a metal plate and grind like a pestle.

    The sieve is the important part.
     
  10. Jul 11, 2019 #10

    MindTone

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    @nutmeg, @McMan Ok what mesh size do I need?

    @valgard I thought it was more rock or metal as in music when I came up with it :p
     
  11. Jul 11, 2019 #11

    McMan

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    Last edited: Jul 11, 2019
  12. Jul 11, 2019 #12

    Xenif

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    If you want to get precise, you can try micro mesh, people use them to make bubble hash and other oil extracts, they get down to 25 microns
    GROWNEER 4-Bag 1 Gallon All Mesh Bubble Bags, Herbal Ice Bubble Hash Bag Essence Extractor Kit, Extraction Bags Filtration Bags Set w/Pressing Screen and Carrying Bag https://www.amazon.ca/dp/B07KR3GC1T/ref=cm_sw_r_cp_apa_i_YZ5jDbXGMGD3W

    And example
     
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  13. Jul 11, 2019 #13

    McMan

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    Getting a sense of Xenif's additional hobbies :D
     
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  14. Jul 11, 2019 #14

    MindTone

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  15. Jul 11, 2019 #15

    YG420

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    I remember those...great memories!
     
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  16. Jul 12, 2019 #16

    Xenif

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  17. Jul 12, 2019 #17
  18. Jul 12, 2019 #18

    lowercasebill

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    thinking out loud again but... i strop with 1 micron diamond, .3 chromium oxide or .25 CBN i am thinking he should be looking for something 5 microns or less????
     
  19. Jul 14, 2019 at 9:30 PM #19

    MindTone

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  20. Jul 14, 2019 at 10:02 PM #20

    lowercasebill

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    Sumpsock amazon. 1 micron free shipping. There are 5 micron bags available.. Google grit to micron it will give you an idea of what you are looking for.
    8000 gives a mirror polish bevel. That is about 4 microns.
    I am not an expert!
     

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