Honing pressure on a JNat

[rockviper]

Update...... Had a great shave with the kamisori this morning. I probably did too much work with the 1K and it shows a bit (oops), but between that and my oodles of 7:2 sets on Botan, Mejiro and Tomo, I ended with with a great DFS result this morning.

Thanks everyone for your inputs!

 

[Gamma]

Awesome!

 

[Slash McCoy]

I don't know... what I call heavy pressure is the full weight of my arm, with no additional force. What I call very heavy pressure would be actually leaning into it, such as a big repair job. Forearm weight is moderate pressure. The hand is light pressure. A finger, very light pressure. Just the weight of the blade wound be extremely light pressure, and any less reduces control beyond what I find useful.

I imagine my arm must be somewhere around 15 lbs. So my "heavy" pressure is probably about 30 lbs but I only find such pressure useful for major steel removal. I don't think of such pressure as "honing", as much as "grinding". That is shape-changing force.

 

[inspiringK]

I don't know... what I call heavy pressure is the full weight of my arm, with no additional force. What I call very heavy pressure would be actually leaning into it, such as a big repair job. Forearm weight is moderate pressure. The hand is light pressure. A finger, very light pressure. Just the weight of the blade wound be extremely light pressure, and any less reduces control beyond what I find useful.

I imagine my arm must be somewhere around 15 lbs. So my "heavy" pressure is probably about 30 lbs but I only find such pressure useful for major steel removal. I don't think of such pressure as "honing", as much as "grinding". That is shape-changing force.

It may be worthwhile grabbing a scale and having a look at what the numbers are really like. I would be interested to find whether there are some using 5 times more pressure than I use. 30 pounds may not seem like a lot when measured by using your hand to lean on a counter or hitting something with a hammer, but even being able to transfer 30 pounds worth of pressure through the two fingers holding the razor or tips of the fingers pressing down onto a blade seems like a big ask.

 

[Gamma]

Lol - just did this 2 minutes ago on a bathroom scale.
Ok - so it's not the worlds most accurate weighing device. But it's all I have handy.
Razor was an Allen Non-XXL wedge. Stone was a Carborundum 102. I used water on the stone and had a rubber block under it.
Had to put the scale up against the wall to keep it from sliding and I moved the block around to get a halfway decent read on the pressure.
Didn't take much doing to get the pressure to read 20-25 lb. Getting to 40 lb took notable effort but it wasn't so very difficult in the conventional sense.

 

[inspiringK]

Lol - just did this 2 minutes ago on a bathroom scale.
Ok - so it's not the worlds most accurate weighing device. But it's all I have handy.
Razor was an Allen Non-XXL wedge. Stone was a Carborundum 102. I used water on the stone and had a rubber block under it.
Had to put the scale up against the wall to keep it from sliding and I moved the block around to get a halfway decent read on the pressure.
Didn't take much doing to get the pressure to read 20-25 lb. Getting to 40 lb took notable effort but it wasn't so very difficult in the conventional sense.

So, what do you think about sharpening at around 30 pounds pressure?

 

[Gamma]

This was more about - what does it take to actually do this?
Not so much - do I want to do this and how do I feel about it?
The experiment took place on a bathroom floor - not exactly prime testing grounds. Wasn't even my bathroom, lol.

Anyway,
I think if I had to take out a big chip and I didn't want to spend a lot of time doing it, it would work.
I also think that the blade needs to be a wedge or similar, and the stone needs to be very hard.
Practically - it would be very difficult to control the cutting going from one side to the other.

I have no issue beating up on a troubled blade but even my most heavy-handed approach is way less invasive.

One surprising thing came out of this - the Carbo 100 series hones are like, what - 6-8k or so?
Well - that 'fine' stone took a good amount of steel off rather quickly. Like - a lot of steel.
If I had a beater Jnat I'd give it a go with Botan slurry just to see what happens then.

 

[inspiringK]

, that's great - One of those signs you have a problem:
Someone catching you in their bathroom, huddled over their bathroom scale with razor and stone in hand, scribbling numbers on a notepadView attachment 393990

"Err, sir,...... Uhm, I don't know who you are, but you are scaring my kids and I think it's better you put the razor down......"

 

[Gamma]

lol - stranger things than this have gone on here.

The scale is in my GF's bathroom and she's so awesome that she wouldn't even blink over something like this.