Show your work! Uchigumori and co...

[harken]

I have 3 (def my fav knives) BBs, two in his standard mystery steel and mild cladding and one in stainless. His standard is reactive, but I can set a patina on it and not worry about rust for months. The stainless is kinda reactive though, in a fun way, like a semi stainless.

Always been afraid to polish them though! Sooo thin at the edge and that concave grind! Props to the skill and courage here haha

 

[Blumbo]

Never really sure if stuff like this belongs in this thread but posting to show differences you can achieve in finish using different combinations of muds and pressures on a bloomery iron (similar concepts apply to wrought)

Light pressure, uchi/king mix

Heavy pressure, uchi alone

 

[demosthenes]

Light pressure, uchi/king mix

Beautiful! For the uchi/king mix, do you start with king until you have a nice kasumi, and then finish on an uchigumori stone?

 

[maxim]

Never really sure if stuff like this belongs in this thread but posting to show differences you can achieve in finish using different combinations of muds and pressures on a bloomery iron (similar concepts apply to wrought)

Light pressure, uchi/king mix
View attachment 388701

Heavy pressure, uchi alone
View attachment 388702

Super nice work !! I love how different that blooming iron can look depends how you finish it, so fare my favoured cladding. Unfortunately it is very hard to forge so only 6 out of 10 make it It is very easy to delaminate

 

[Simply]

Never really sure if stuff like this belongs in this thread but posting to show differences you can achieve in finish using different combinations of muds and pressures on a bloomery iron (similar concepts apply to wrought)

Light pressure, uchi/king mix


Heavy pressure, uchi alone

This kicks ass as always. Stones or just powder/slurry? What are you using to apply powder/slurry? About to pick up a mortar/pestle just for rocks and a bunch more felt furniture pads.

 

[Blumbo]

Beautiful! For the uchi/king mix, do you start with king until you have a nice kasumi, and then finish on an uchigumori stone?

This kicks ass as always. Stones or just powder/slurry? What are you using to apply powder/slurry? About to pick up a mortar/pestle just for rocks and a bunch more felt furniture pads.

Thanks! I have a bunch of dried up old king and uchi slurry that has turned into dust and I rehydrate slightly. For backing I use a really really dulled 3m fine sanding sponge - like has minimal cutting power on it's own or it'll introduce scratches - the more dull the sponge the more it'll approach a felt pad backing finish (more pearlescent). The less dull the more contrast you'll get.

 

[bowei]

Tried to do a full stone progression on this JB. Still not perfect but I am happy I can go to the Jnats now. Currently it's finished by naniwa 3k super

 

[bowei]

Nakayama suita. Hard to get a even finish since the cladding is super reactive (I suck)...

 

[The Forest Ninja]

Nakayama suita. Hard to get a even finish since the cladding is super reactive (I suck)...

I use a little Sodium Carbonate in my water to reduce metal oxidation or rusting.
I get locally sold under the name Washing Soda.

 

[Keens]

My first manual (start to finish) thinning job, ever. Completely flattened the takefu hollow on my Masakage Bunka. Debado 200,SG500, King 1000, BBW. Decided to try a Naniwa 10k for fun, but will take it back to the BBW finish for use as it’s what I prefer.

 

[NotAddictedYet]

My first manual (start to finish) thinning job, ever. Completely flattened the takefu hollow on my Masakage Bunka. Debado 200,SG500, King 1000, BBW. Decided to try a Naniwa 10k for fun, but will take it back to the BBW finish for use as it’s what I prefer.
View attachment 391547

Nice job! do you know how much height the knife lost from flattening the hollow grind?

 

[Keens]

Nice job! do you know how much height the knife lost from flattening the hollow grind?

About 1mm from original, mainly due to a conscious effort not too. It is quite a bit thinner at the edge and the shinogi line was raised considerably (I had room to fix my screw ups) but I am much happier with the performance

 

[xtcxtq]

Polish on madara

 

[Metallicats44]

Raquin ReCTaNgLe just in time for ARM. I may or may not be trading this Videos are Maruoyama Shiki Uchigumori from @ethompson and pictures are Ohira Uchi from @nutmeg

 

[xtcxtq]

Decided to give my migaki knife a polish and “re-handle”

 

[Heckel7302]

Tried to do a full stone progression on this JB. Still not perfect but I am happy I can go to the Jnats now. Currently it's finished by naniwa 3k super

For reactive stones I have a spray bottle of water with some baking soda mixed in. I use that to wet the stone exclusively and don't get much patina during the polishing process.

 

[bowei]

For reactive stones I have a spray bottle of water with some baking soda mixed in. I use that to wet the stone exclusively and don't get much patina during the polishing process.

Thanks! I will give it a shot. Do you have any mixing ratio for the baking soda?

 

[Heckel7302]

Thanks! I will give it a shot. Do you have any mixing ratio for the baking soda?

Not really. Just a couple tablespoons probably. Enough to neutralize the acid in the stone

 

[simona]

Never really sure if stuff like this belongs in this thread but posting to show differences you can achieve in finish using different combinations of muds and pressures on a bloomery iron (similar concepts apply to wrought)

Light pressure, uchi/king mix
View attachment 388701

Heavy pressure, uchi alone
View attachment 388702

I am always intrigued when I read, "heavy pressure", but honestly I do not know what the feels like under the finger. There is a video of Bob Kramer sharpening a knife where he actually pushes on a kitchen scale to demonstrate exactly the pressure he was using - could you do the same?
Cheers

@3.06

 

[tim huang]

Iyo-to. Tmr would be Tajima-awesado-suita- finger stine

 

[tim huang]

Ohira Awasedo

 

[jacobwilder5]

Thinning 52100 shi.Han on fsk 400. Switched pattern to show where the thinning focus is. It ain’t fun but it’s worth it in the end.

 

[nutmeg]

Not sure if this belongs here but here’s a WIP of a tamahagane knife made by marcin grabowiec. There’s a hamon in here that I’m not pulling out fully

View attachment 373417
View attachment 373418

A softer stone on the ha and a finer stone on the ji should do the trick. Nice blade!

 

[Infidelity]

First time thinning a knife and polishing. Shapton Glass 220, 500, 2k, 4k, diamond compound, then finished with uchi powder.

Final:

Before:

 

[tim huang]

 

[bowei]

Simon long petty on naniwa 3k super.

 

[Veitchii]

Super quick 1 hr polish (120 grit - uchi) on this shabby little kiri I made yesterday. My A36 cladding really isnt differentiating itself from the 1095, and I'm wondering if that's because of the composition or if it's because of something else.

 

[JPAU]

Simon long petty on naniwa 3k super.

Pointy long petties bring me such joy

 

[bowei]

Pointy long petties bring me such joy

Probably my ultimate petty right now. Perfect ku and easy to polish core. Slightly convex on the very edge and it surprisingly doesn't wedge much on a regular sized carrot.

 

[JPAU]

Probably my ultimate petty right now. Perfect ku and easy to polish core. Slightly convex on the very edge and it surprisingly doesn't wedge much on a regular sized carrot.

Damn you @bowei !! I have been ignoring the Maillet emails and drops but now I feel compelled to pay attention. At least I wouldn’t be competing for a gyuto every time, although supplier of these petties is shorter too. Mind sharing the specs?