Thread: super hollow coticule

Here’s another idea, just smooth it out and make that hollow as uniform as possible. Then use it for microbevels and wedges.

Alex Gilmore (Japan Stone) once made a hollowed hone that looked a lot like yours. He made a fixture to grind the stone uniformly. The idea was to be able to hone wedges without tape. I had the stone for a while and measured the radius of the hollow to be a little over 1 meter, about 42” IIRC. The math showed that the hollow would increase the bevel angle by about 1 degree, or one layer of tape.

The nice thing about this strategy is that you don’t lose much stone, you just need to find a use for it as-is.

Cheers, Steve

Thanks Steve - interesting idea - this could be the ideal outcome... cheers Bart

Originally Posted by Steve56

Here’s another idea, just smooth it out and make that hollow as uniform as possible. Then use it for microbevels and wedges.

Alex Gilmore (Japan Stone) once made a hollowed hone that looked a lot like yours. He made a fixture to grind the stone uniformly. The idea was to be able to hone wedges without tape. I had the stone for a while and measured the radius of the hollow to be a little over 1 meter, about 42” IIRC. The math showed that the hollow would increase the bevel angle by about 1 degree, or one layer of tape.

The nice thing about this strategy is that you don’t lose much stone, you just need to find a use for it as-is.

Cheers, Steve

Originally Posted by bartds

Hi Richard , scored some more at the annual antiques market last week - will post more as I have no idea what they are - best wishes BartAttachment 292058

You have to tell me where you get that kind of loot!!!

Hi , just lucky I guess - an elderly woman selling old chisels and scissors - one cardboard box loaded with hones was tucked away- must have been at least 30 pieces - all vintage - picked the nicest naturals - should have made a pic ( now I realise...) She made a special price too : 20 euro for the lot - only knew the coti ( I have a vintage La Veinette ) haven't identified the rest of the rocks yet but the maroon one might be a 'La Lorraine or Rouge de Salm ?' and the green one I hope to be a Thuri - not a clue what the square one glued to the wood may be - never seen a chocolate coloured natural - I'll post some more later - I known there are some specialists here who will be able to tell me... Cheers , Bart

Originally Posted by malaverdiere

You have to tell me where you get that kind of loot!!!

Bart
Do you think that that long hollow Coticule was being used long ago as a razor hone or a knife stone? Any idea?

Alex

Hi Alex , I received a PM from a member to advise me to use as is ... I did with an old 5/8 max fassbinder razor (extra hollow solingen)which was produced during the second world war and I was truly impressed ... consider it as being like a skateboard ramp the razor just follows the curve - no X strokes just straight... It gave me a very nice edge - the edge is very narrow just like one would have used 3 or 4 layers of tape . the stone itself is very fast cutting - ended with 30 strokes - weight of the blade only- with glycerine soap - 30 on linen and 30 on leather. very nice shave - yes I'am pretty sure it was used as a barber hone and I am quite sure he was happy with it , best regards Bart

Originally Posted by alx

Bart
Do you think that that long hollow Coticule was being used long ago as a razor hone or a knife stone? Any idea?

Alex

I want to see that honing. Mind making a video???

From the era of the full wedges in Europe, this was the way they honed without tape. I am convinced of this. Yours has a very advanced concave profile and as you said acted like as you say 3 or 4 layers of tape, a shallower concave would represent 1 or 2. Great piece of history. Thanks for the follow up.

Alex

hello Ok I'll give it a try - honed my freshly restored 15/16" Joseph Rodgers on that stone today - nice edge but the proof of the pudding will be in the eating - will give it its maiden shave tonight

Originally Posted by malaverdiere

I want to see that honing. Mind making a video???

Cheers Alex - thanks to a member who PM'd me I did not cut the rock (However I was ready to ... ) he stated that if a barber used it for so long it must have been Ok - so I took the chance and I honed my 15/16" Rodgers wedge this afternoon - I'll see how the shave turns out tonight , regards Bart

Originally Posted by alx

From the era of the full wedges in Europe, this was the way they honed without tape. I am convinced of this. Yours has a very advanced concave profile and as you said acted like as you say 3 or 4 layers of tape, a shallower concave would represent 1 or 2. Great piece of history. Thanks for the follow up.

Alex