Hone from good friend

[Proximus26]

Hello all good people,

this is my first post and I`m here because I found really good friend on this forum, Doc266, who introduce me to this forum.
I heard many good things about B&B and I hope my opinion will be positive about this forum to the end of this web community.

For start I have question related to hone. Good friend of my send me hone, which I never seen before. I have only set of Norton’s and 2 C12K and one LI stones. This one is new and I really don`t know what to use it for. I will need your help, to tell me what and for what will be best to use this hone.

[Proximus26]

Some more pictures

[hig789]

Vintage coticule. Looks like its had a rough life, you will need to lap it, I'm sure it will turn out great. As far as use you can use it from bevel setting to finishing.

[hig789]

What size is it?

[Doc226]

Thanks for the kind words, many good and helpful people here.

I agree that is a coticule, the most versatile stone IMO. You will need to lap it flat and will need a slurry stone. They may take some time to get then hang of them, but they give fantastic edges. My advise is to finish on oil.

http://www.coticule.be/dilucot-honing-method.html

[hig789]

My advise is to finish on oil.

Don't do it!!!! At least don't mention it on the other site.

[Doc226]

Don't do it!!!! At least don't mention it on the other site.

Hahahahaha-I know, I know

[Doc226]

Mariusz, are those divots palpable?

[Proximus26]

Mariusz, are those divots palpable?

Yes, they are and they are not :-). In fact I have try hone one razor yesterday on both sides, not sure if there is any difference in the grit. I have try without water or oil. Black side looks like an lower grit. Funny thing is that chips in the stone has not hit razor in anyway. Went smooth over them :-) But I`m impressed with stone quality. It took edge really fast and nicely from one of my restored razors.

Regards size, it is small stone, 1,5 inch wide, 6 inch long and about 1 in tall.

Now you mean use this stone for finishing... you mean finishing prior polishing? Or Finishing as"last stone"?

[hig789]

The yellow(coticule)side is going to be faster than the black(BBW) side. If your blade doesn't hit the chips I wouldn't worry about them, but you will still need to lap it flat. You can use this stone with slurry to set bevels and dilute it down to water for finishing or finish on oil like Doc likes.

[tomjr]

looks like a nice vintage stone.

[BakerAndBadger]

Proximus, if you are in belgium I'll be willing to take it off your hands - it's actually a door stop.

[Proximus26]

So small update. I try stone again but now without water and later with water and thick slurry. Wow... well I`m new to belgian stones but I really like them. Black side it is similar to my LI stone however take edge must faster then I see anything before. My dull/restored razor was getting bevel just after 20 passes!!!! This is amazing! I like it already and looking more forward to use more techniques on this stone. Thank you everyone for your help and directions!!!

[Proximus26]

Hello all good people,

Question regards this belgian stone.I have noticed one thing after I did test with slurry from yellow part of stone. I have made more slurry then usually and allowed slurry to be thick, like mud. After that I start honing razor. Under 100X microscope I have noticed that surface of razor edge become very smooth, polish. It looks similar to my LI or C12K. Is it possible that this slurry works little bit better that diluted slurry or luck slurry? What I mean, does this slurry could polish more razor and razor edge become smoother. I`m new to coti so my question might be dumb, but I got very interested in this particular slurry. Very interesting stone...

Thank you!

[paco664]

do this... after you get it as sharp as you can with slurry.... wash the stone off with water and pat dry....

put a few drops of oil on it and smear it around with your finger.... give it 30 or so passes with light pressure or no pressure...

strop... shave... enjoy....

you got a nice stone there..

[Pkrankow]

Nice size stone. Sounds like the surface damage is negligible, if it is otherwise flat lapping is up to you. There is a theory about dished hones having a similar effect as taping the spine and using a lapped hone.

The grit of the BBW side is similar to the grit of the yellow side, the particles are similar in size, but not in loading. The BBW side is generally a lighter load of garnet particles.

Belgian Blue Whetstone is removed from the earth to get to the yellow coticule. They also build buildings out of the stuff.

Phil

[paco664]

Nice size stone. Sounds like the surface damage is negligable, if it is otherwise flat lapping is up to you. There is a theory about dished hones having a similar effect as tapeing the spine and using a lapped hone. The grit of the BBW side is similar to the grit of the yellow side, the particles are similar in size, but not in loading. The BBW side is generally a ligher load of garnet particles Belgian Blue Whetstone is removed from the earth to get to the yellow coticule. They also build buildings out of the stuff. Phil

unless you bought a super ultra sooper dooper rare coti... *(this is a honing section inside joke... lol...)

[SliceOfLife]

How smooth the edge is at 100x isn't a very good way to judge sharpness. DMT plate finishes (1200 and 8000) look way way way better at 1k than a coticule finish does. Because you're seeing how even the edge is, not how thick it is (Depth along the X axis where the two planes meet... thick isn't really a good term, but a better one evades me at the moment). DMT's (And extremely large amounts of loose garnets... mud on a coti for instance) cut VERY uniformly across the edge, making it smooth in profile. But they also cut DEEP and with large particles, making the edge thick and very UNEVEN if you were able to view it head on (looking at the blade as if it were about to cut the microscopes lens).


In short, very coarse particles in thick slurry make edges that usually look great because what you are looking at is only very very very very loosely related to sharpness. At higher resolution and given that the razor is sharp, an even edge like you're seeing in profile is desirable, but an even edge is not indicative of sharpness. You can smooth the corner of a piece of sheet metal and have it look damn even under a scope, it still won't be razor sharp.


If none of that makes sense. You're looking at the edge in the Z axis. The edge needs to be even (and THIN) in the X axis as well as even in the Z axis to be sharp.

[kirk 988]

have you had it checked for garnet content ? 70% seems to be the number for the best ones.
but im not sure yours is naturaly bonded to the BBW although not sure because i dont own coti's so its not woth 800$
have you had it checked by an expert geologist that specialises in garnet crystals and is qualified not just in belgium but the USA also.


dont take anything that ive said above to heart its a joke.
great looking stone

[Disburden]

Thats a good friend!
I love Coticules ....my favorite hones.