A formal apology to synthetic nagura

[Pie]

I’ve been hugely dismissive of them in the past. Possibly stemming from my obsession with jnats and their perceived gobs of mystique.

I’d like to retract my previous foolishness - synthetic nagura have their uses, and are damn good at it too.

This revelation brought to you by the ever glazing SG220.. extended slow geometry work really smooths this stone out. A quick scrub with the cerax 320 cleaning stone/nagura quickly adds some spicy grit and restores strong feedback and cutting power. Until I get my hands on a sigma 240..

Side note - slightly convexing this stone works wonders. No more random chunks missing from the bevel due to a big lip of stone on the right side.

 

[esoo]

You may just want this:
https://www.leevalley.com/en-ca/shop/tools/sharpening/stones/111626-shapton-lapping-disc

 

[HumbleHomeCook]

You may just want this:
https://www.leevalley.com/en-ca/shop/tools/sharpening/stones/111626-shapton-lapping-disc

I like the looks of that. Have you used one?

 

[esoo]

I like the looks of that. Have you used one?

I have it. Works decently as a cleaning stone.

 

[HumbleHomeCook]

I have it. Works decently as a cleaning stone.

Something you like better?

 

[esoo]

Something you like better?

I really don't have much in the way of lapping/clearing. I have a 6x6 inch 140 grit plate I got off eBay and this disc. I usually just do stone against stone. I'm not the best to give opinions. I did just use it to clean up my SG500 after sharpening and it worked well.

 

[sansho]

atoma 140 plate?

 

[Benuser]

atoma 140 plate?

It certainly works but will reduce considerably the Atoma's life span. They are a bit expensive for the matter.
For coarser stones I use this diamond pad. Take care, when it is brand new a loose particle may break out and cause terrible damage if you don't rince it carefully. No longer an issue once they have broken in. Leaves a bit of slurry that's very helpful. I've used a previous one for some two years with coarse Shaptons Pro and Glass from 120 to 320.

 

[Pie]

I’ve tried the atoma 140, unfortunately it seems to leave the surface quite slick, as odd as that may seem. I could, however, very well be doing it wrong.

For all out flattening or resurfacing, I’ve defaulted to sic powder and glass plate. I don’t love doing it twice a night tho and it does take more time than rubbing nagura around quickly.

It certainly works but will reduce considerably the Atoma's life span. They are a bit expensive for the matter.
For coarser stones I use this diamond pad. Take care, when it is brand new a loose particle may break out and cause terrible damage if you don't rince it carefully. No longer an issue once they have broken in. Leaves a bit of slurry that's very helpful. I've used a previous one for some two years with coarse Shaptons Pro and Glass from 120 to 320.View attachment 191909

I keep seeing this posted, and likely for good reason. I can ignore it no longer. Thank you .

 

[Benuser]

Not surprised at all by the slick surface the Atoma is leaving. It isn't glazed, though, and I don't think it makes the sharpening much less effective. You may try using much more water and reducing pressure.

 

[Blank Blades.]

It certainly works but will reduce considerably the Atoma's life span. They are a bit expensive for the matter.
For coarser stones I use this diamond pad. Take care, when it is brand new a loose particle may break out and cause terrible damage if you don't rince it carefully. No longer an issue once they have broken in. Leaves a bit of slurry that's very helpful. I've used a previous one for some two years with coarse Shaptons Pro and Glass from 120 to 320.View attachment 191909

I've been wanting to get these for a while. Not so much for stones, but doing hand sanded finishes on high vanadium carbide knives.

 

[Pie]

Not surprised at all by the slick surface the Atoma is leaving. It isn't glazed, though, and I don't think it makes the sharpening much less effective. You may try using much more water and reducing pressure.

I’m going to have to give it some more testing.. good thing I have 280mm of bevel to work on

 

[boblob]

Not surprised at all by the slick surface the Atoma is leaving. It isn't glazed, though, and I don't think it makes the sharpening much less effective. You may try using much more water and reducing pressure.

@Benuser are you saying that even though the shapton glass 220 is smooth after you flatten it using an atoma 140 it shouldnt affect how well the shapton glass 220 cuts/abrades metal ?

what about other stones say a king deluxe 300 is it still the case even though the atoma 140 leaves a smooth finish on the king 300 it shouldnt affect how well it cuts/abrades metal?

 

[Benuser]

@Benuser are you saying that even though the shapton glass 220 is smooth after you flatten it using an atoma 140 it shouldnt affect how well the shapton glass 220 cuts/abrades metal ?

My suggestion about using more water and less pressure applies both to the use of the Atoma and the sharpening afterwards. I haven't seen real glazing. But as said before, these diamond pads are great if the goal isn't so much to flatten the stone as to make the surface a bit rougher. A formal apology to synthetic nagura

 

[Delat]

It certainly works but will reduce considerably the Atoma's life span. They are a bit expensive for the matter.
For coarser stones I use this diamond pad. Take care, when it is brand new a loose particle may break out and cause terrible damage if you don't rince it carefully. No longer an issue once they have broken in. Leaves a bit of slurry that's very helpful. I've used a previous one for some two years with coarse Shaptons Pro and Glass from 120 to 320.View attachment 191909

Thanks Ben, found the US amazon link for those interested:
https://www.amazon.com/Glass-Polish...electroplated+diamond+hand+pad,aps,152&sr=8-3
And the vendor (manufacturer?):
https://glasspolishshop.com/abrasive-discs-pads/diamond-pads?product_id=251

 

[esoo]

I like the looks of that. Have you used one?

I'm going to come back to this - if you use the Shapton lapping disc, make sure to clean your stone well afterwards. The disc drops grit. Found out the hard way when I didn't clean my stone well as was trying to prep for a polish and got some nasty scratches on the knife.

 

[Benuser]

I'm going to come back to this - if you use the Shapton lapping disc, make sure to clean your stone well afterwards. The disc drops grit. Found out the hard way when I didn't clean my stone well as was trying to prep for a polish and got some nasty scratches on the knife.

I'm trying not to imagine the sound.

 

[esoo]

I'm trying not to imagine the sound.

You mean the "WTF, where did that come from?". Thankfully it was early in the progression so I hadn't put that much work in. Have put the task aside for a while as I don't want to think about it.

 

[boblob]

My suggestion about using more water and less pressure applies both to the use of the Atoma and the sharpening afterwards. I haven't seen real glazing. But as said before, these diamond pads are great if the goal isn't so much to flatten the stone as to make the surface a bit rougher. A formal apology to synthetic nagura

@Benuser
if you dont mind may i ask what is your reason for using the pads and atoma insted of the loose silicon carbide ?
i have my reasons for not using it but what are yours ?

 

[Benuser]

@Benuser
if you dont mind may i ask what is your reason for using the pads and atoma insted of the loose silicon carbide ?
i have my reasons for not using it but what are yours ?

Just haven't tried so far. Seems quite messy. Isn't as easily available where I live.

 

[Benuser]

You mean the "***, where did that come from?". Thankfully it was early in the progression so I hadn't put that much work in. Have put the task aside for a while as I don't want to think about it.

No, I remember the horrible sound of a diamond particle when sharpening.

 

[esoo]

No, I remember the horrible sound of a diamond particle when sharpening.

The Shapton lapping disc isn't diamond - it's like a 120grit stone.

https://www.leevalley.com/en-ca/sho...ones/111626-shapton-lapping-disc?item=61M0415

 

[Blank Blades.]

Just haven't tried so far. Seems quite messy. Isn't as easily available where I live.

Yeah. The mess is the worse part for me.

It is effective when other things arent though.

Particularly on stones lower than 120 grit. (And on 120 as well.)

 

[mengwong]

@Benuser are you saying that even though the shapton glass 220 is smooth after you flatten it using an atoma 140 it shouldnt affect how well the shapton glass 220 cuts/abrades metal ?

what about other stones say a king deluxe 300 is it still the case even though the atoma 140 leaves a smooth finish on the king 300 it shouldnt affect how well it cuts/abrades metal?

See testing abrasion rate (testing stone speed)

 

[boblob]

See testing abrasion rate (testing stone speed)

@mengwong thank you for linking this