Page 1 of 3 123 LastLast
Results 1 to 20 of 53

Thread: How To Get The Most Out Of A J-Nat

  1. #1
    Join Date
    Sep 2009
    Location
    Rome, NY
    Posts
    1,158
    Images
    40

    Default How To Get The Most Out Of A J-Nat

    I am new to Japanese natural stones. I have done a good amount of reading about them, but I still have some questions. I've read that using a Nagura stone on the J-Nat breaks down the particles of the stone, making it even finer. I thought slurry stones make hones more coarse?
    Matt

  2. #2
    Join Date
    Aug 2011
    Location
    Morr-ace, IL
    Posts
    763

    Default

    I believe what happens is the Nagura on the JNAT makes a coarser slurry than the JNAT with water. The Nagura slurry eventually breaks down and slowly becomes finer. This results in a Slurry that starts coarser and becomes finer leading you into where you will use water only to finish.

  3. #3
    Join Date
    Oct 2010
    Location
    My Grandmama's Condo
    Posts
    13,665
    Images
    16

    Default

    Quote Originally Posted by raccoonandbrush View Post
    I am new to Japanese natural stones. I have done a good amount of reading about them, but I still have some questions. I've read that using a Nagura stone on the J-Nat breaks down the particles of the stone, making it even finer. I thought slurry stones make hones more coarse?
    Your are right, it does make it more coarse. Depending on what stage your are in your honing, you would use nagura to bridge the gap to finishing, or if you are the finishing point already then just on water. Jnats are like 80% black magic in my opinion...moreso than coticules. It took me a while to get a good edge on mine. My best edges so far involved 0.05 poly diamond spray...but I'm a rebel :)
    ~ ​​Kent
    <[Self-certified Straight Shaver]>
    。。現在日本剃刀に夢中。。

  4. #4
    Join Date
    Jul 2010
    Location
    Brooklyn
    Posts
    7,715

    Default

    I haven't seen Nagura making the surface of the stone less fine or more coarse.
    But - Botan Nagura slurry is more coarse than the slurry obtained from using the Tomo Nagura.
    The stone is harder than the Nagura - the slurry comes from the Nagura. With Tomo nagura, it's equally hard as the stone, and all I see is a polishing effect on the stone.
    Maybe I'm wrong - but that's how it seems to me so far. I'm new to these stones also, and I'm learning as I go.

  5. #5
    Join Date
    Oct 2010
    Location
    My Grandmama's Condo
    Posts
    13,665
    Images
    16

    Default

    I guess I should have said that the slurry makes the stone cut more, but the stone stays the same regardless.
    ~ ​​Kent
    <[Self-certified Straight Shaver]>
    。。現在日本剃刀に夢中。。

  6. #6
    Join Date
    Sep 2009
    Location
    Rome, NY
    Posts
    1,158
    Images
    40
    Thread Starter

    Default

    Quote Originally Posted by Kentos View Post
    I guess I should have said that the slurry makes the stone cut more, but the stone stays the same regardless.
    Isn't that the same thing as using a coarser stone?
    Matt

  7. #7
    Join Date
    Oct 2010
    Location
    My Grandmama's Condo
    Posts
    13,665
    Images
    16

    Default

    Quote Originally Posted by raccoonandbrush View Post
    Isn't that the same thing as using a coarser stone?
    Well, technically speaking the characteristics of the stone remain the same. Kind of like lapping powder on a glass plate. Adding the powder to the glass doesnt make the GLASS coarse. Wipe off the powder and the glass iis still smooth, albeit a bit scratched up. I guess its just semantics.
    ~ ​​Kent
    <[Self-certified Straight Shaver]>
    。。現在日本剃刀に夢中。。

  8. #8
    Join Date
    Oct 2010
    Location
    My Grandmama's Condo
    Posts
    13,665
    Images
    16

    Default

    I should add my understanding of nagura honing is the initial slurry is "coarse". As you take your laps the slurry slowly breaks down to finer and finer particles until you are left with just the final grit of your stone, or maybe a bit lower. Some then wash off the slurry and finish on water for even a finer edge...YMMV of course. Coticule slurry doesnt breakdown as readily, so dilution of the slurry is needed to reduce the cutting action of the slurry.
    ~ ​​Kent
    <[Self-certified Straight Shaver]>
    。。現在日本剃刀に夢中。。

  9. #9
    Join Date
    Sep 2009
    Location
    Rome, NY
    Posts
    1,158
    Images
    40
    Thread Starter

    Default

    Quote Originally Posted by Kentos View Post
    I should add my understanding of nagura honing is the initial slurry is "coarse". As you take your laps the slurry slowly breaks down to finer and finer particles until you are left with just the final grit of your stone, or maybe a bit lower. Some then wash off the slurry and finish on water for even a finer edge...YMMV of course. Coticule slurry doesnt breakdown as readily, so dilution of the slurry is needed to reduce the cutting action of the slurry.
    I see.
    Matt

  10. #10
    Join Date
    Aug 2009
    Location
    Blacksburg, VA
    Posts
    1,620
    Images
    29

    Default

    Quote Originally Posted by raccoonandbrush View Post
    I am new to Japanese natural stones. I have done a good amount of reading about them, but I still have some questions. I've read that using a Nagura stone on the J-Nat breaks down the particles of the stone, making it even finer. I thought slurry stones make hones more coarse?
    the base stone should be harder than any nagura or tomonagura used on it. When you work the slurry from the nagura/tomonagura it will gradually break down to become muc finer. You can finish on the base stone with water or if you like.
    Last edited by mainaman; 12-31-2011 at 10:10 PM.

  11. #11

    Default

    Quote Originally Posted by mainaman View Post
    the base stone should be harder than nay nagura or tomonagura used on it. When you work the slurry from the nagura/tomonagura it will gradually break down to become muc finer. You can finish on the base stone with water or if you like.
    I was under the impression that base stone should be harder than any nagura as you say, but that the tomonagura should be harder in order to hone on slurry released from the base stone itself.
    All your Dorkos are belong to me!

    -- Steve

  12. #12
    Join Date
    Oct 2010
    Location
    My Grandmama's Condo
    Posts
    13,665
    Images
    16

    Default

    Tomonagura means, same, together, or friend nagura...so that way maybe it wont matter which stone release the slurry?
    ~ ​​Kent
    <[Self-certified Straight Shaver]>
    。。現在日本剃刀に夢中。。

  13. #13

    Default

    ^ It seems to be relatively seldom that the tomonagura in question is actually cut from the same stone. It kinda does matter (to me, anyway...) that the slurry I'm using should - under 'normal' circumstances - ideally come from the expensive and hopefully high-quality hone itself. Having said that, I have not yet found anything harder than my finisher and that won't barely even raise a detectable slurry anyway (but it's not needed....). On a pre-polisher, I use a hard suita tomonagura which does the trick for me. But like I said...that's just my thinking.
    Last edited by Woodash; 12-31-2011 at 06:06 PM.
    All your Dorkos are belong to me!

    -- Steve

  14. #14
    Join Date
    Aug 2009
    Location
    Blacksburg, VA
    Posts
    1,620
    Images
    29

    Default

    Quote Originally Posted by Woodash View Post
    I was under the impression that base stone should be harder than any nagura as you say, but that the tomonagura should be harder in order to hone on slurry released from the base stone itself.
    you need the base stone to be the hardest stone in the system.

  15. #15
    Join Date
    Aug 2009
    Location
    Blacksburg, VA
    Posts
    1,620
    Images
    29

    Default

    Quote Originally Posted by Kentos View Post
    Tomonagura means, same, together, or friend nagura...so that way maybe it wont matter which stone release the slurry?
    From what I gather in Japan they do not cut slurry stones from the main stone. I have seen only one exception so far, and that was done by the owner after they purchased the stone.

  16. #16
    Join Date
    Oct 2010
    Location
    My Grandmama's Condo
    Posts
    13,665
    Images
    16

    Default

    So if I am having trouble getting a slurry going with my tomonagura I need a softer nagura maybe? Or
    maybe just more practice
    Last edited by Kentos; 01-01-2012 at 12:42 AM.
    ~ ​​Kent
    <[Self-certified Straight Shaver]>
    。。現在日本剃刀に夢中。。

  17. #17
    Join Date
    Aug 2009
    Location
    Blacksburg, VA
    Posts
    1,620
    Images
    29

    Default

    Quote Originally Posted by Kentos View Post
    So if I am having trouble getting a slurry going with my tomonagura I need a softer nagura maybe? Or
    maybe just more practice
    what are you using? Do you have a pic?

  18. #18
    Join Date
    Oct 2010
    Location
    My Grandmama's Condo
    Posts
    13,665
    Images
    16

    Default

    Here is my no name Japanese hone. My Father bought it 20 years ago when we lived in Yokohama...I think it was 10,000 yen. It also just occurred to me that the nagura is a Oozuku tomo, and not the same as the no name rock, so that may be my problem...either way unless i really bear down on the nagura with pressure I get nothing...and even then I just barely can see anything in the water...although there is an earthy smell. Maybe I dont need much slurry at all and I am trying to hard. The surface is very smooth, and semi reflective when dry- I cant see my face it it, but if i look at a very shallow angle i can see my surroundings in it.
    ~ ​​Kent
    <[Self-certified Straight Shaver]>
    。。現在日本剃刀に夢中。。

  19. #19
    Join Date
    Aug 2011
    Location
    Morr-ace, IL
    Posts
    763

    Default

    The pattern on your rock Kentos points to it being a Kan but the color / mine may be tricky but if we compare colors to one at Japanese Natural Stones it looks similar to an Ozuku Kan. http://www.japanesenaturalstones.com...roductCode=327 It may even be a Wakasa Kiita/Kan because it has the same color, spotting and if you look closely it has a rust colored kan (ring) pattern. http://www.japanesenaturalstones.com...s.asp?Cat=1821 Maybe you should contact him and see if he can identify it and recommend a different Nagura?
    Last edited by CyiDev; 01-01-2012 at 04:17 PM.

  20. #20
    Join Date
    Oct 2010
    Location
    My Grandmama's Condo
    Posts
    13,665
    Images
    16

    Default

    Thanks for those links Cyi. I contemplated getting a true tomonagura, but have had good results with the untraditional, somewhat sacrilegious use of nano diamond sprays in place of slurry for finishing .
    ~ ​​Kent
    <[Self-certified Straight Shaver]>
    。。現在日本剃刀に夢中。。

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
By accessing Badger & Blade, you agree to abide by the Terms of Usage. You can find our Privacy Policy here.
Once submitted, any posts, images, or content become the property of Badger & Blade.
Powered by vBulletin® - Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.