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Username Post: Polishing knives to a mirror finish        (Topic#880917)
ychern
Member
*
06-24-10 16:56.07 - Post#2156742    



Is there anyway to polish carbon steel knives to a mirror finish? So far i've tried various grits of fine sand paper and used a dremmel with red rouge. I've gotten close with the dremmel, but it isn't consistent. Any advice is appreciated, thanks!
 


RRLOVER
Master Member KnifeNut!
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06-24-10 23:01.22 - Post#2156837    


    In response to ychern

You will need a 6" or 8" buffer if you want it consistent.Thats assuming you sanded up to 2k+.
 
Seb
Master Member KnifeNut!
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06-24-10 23:37.17 - Post#2156848    


    In response to ychern

FWIW, this is generally not a great idea as mirror polish tends to make your blade a lot more sticky (I'm finding this out the hard way).
 
watercrawl
Master Member KnifeNut!
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06-25-10 01:33.14 - Post#2156900    


    In response to Seb

The answer to this question really depends on what you consider "Mirror polished".

Mirror polished can be done to different levels. I've seen mirror polished mean anything from "I can see my reflection pretty good in the side of the blade, but there are a lot of light scratches that I can see"....to...."I could do neurosurgery in the reflection in this bad boy".

You can get a so, so mirror with just really high grit sandpaper....say upto 5,000 grit. That provides a pretty darn nice mirror. But, 8,000 grit sandpaper and some pink compound on a buffer will make it even more so.

The problem with using a Dremel, as RRLOVER eludes to, is that the drum is tiny and you'll never be able to even it out with that tiny thing. You need a large buffing wheel. However, such a wheel will heat up the blade quick fast and you can damage the blade with a buffer if you're not careful.
Adam

www.marrknives.com

Marr Knives on FB



 
butcher_block
Master Member KnifeNut!
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06-25-10 01:42.48 - Post#2156908    


    In response to watercrawl

and things to remember are
the blade after the first use will color or that the first wash can mar a blade if your not carefull

also that buffing wheel can ripe a blade out of your hands so fast that you cant react
the shop buffer migth be one of the most dangerous tools in a shop
 
Bear_Blade
Master Member KnifeNut!
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06-25-10 02:24.44 - Post#2156933    


    In response to butcher_block

I agree with Butch. The type of wheel makes a difference as well. The tight sewn, treated muslin is agressive, then the untreated wheel, a little less agressive, and the loose sewn for final pass. Please be carefull, if those wheels grab yuor knife, it WILL fly. I have heard of guys having to take a blade out of their thigh or foot.
Feel free to check out my website.

www.rodrigueknives.com



 
ychern
Member
*
06-26-10 17:10.35 - Post#2158081    


    In response to Bear_Blade

Thanks for the advice! I appreciate it. I did try sandpaper up to 1500 grit, guess I'll go higher. So how do they get a mirror finish on a knife like a honyaki? Buffer? It really isn't that important to me to get them to a mirror finish, just something I wanted to try out.
 
C9
Master Member KnifeNut!
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06-26-10 17:22.06 - Post#2158082    


    In response to ychern

  • ychern Said:
Thanks for the advice! I appreciate it. I did try sandpaper up to 1500 grit, guess I'll go higher. So how do they get a mirror finish on a knife like a honyaki? Buffer? It really isn't that important to me to get them to a mirror finish, just something I wanted to try out.



Stones, and stone grit compounds. Thats how they get the definition in the hamon.
 
mainaman
Master Member KnifeNut!
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06-26-10 19:28.01 - Post#2158110    


    In response to C9

Perfect mirror very tough to get probably impossible
I have tried to do that on a razor and there is always something left behind.
I can imagine on a knife because of the size it will be even harder. I have had a decent success with sandpaper, and I think if you can use some finger stones for final polish you can get a good result
 


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