Thread: Razor eating into hone

Originally Posted by OLD_SCHOOL

I'm to understand the Chinese 12k is supposed to be a natural hone, so I have no idea why they make reference to its grit. Apparently they're not even 12k either, something like 95% of them are only in the 10k range.

My (dirty)stone have a lot of dark lines in it, could that be some kind of pollution?

Originally Posted by KristofferBodvin

My (dirty)stone have a lot of dark lines in it, could that be some kind of pollution?

probably. It might just be some random crap stone mixed in. Go outside and grab a rock and try to hone on it. see if the razor digs in.

Originally Posted by loueedacat

probably. It might just be some random crap stone mixed in. Go outside and grab a rock and try to hone on it. see if the razor digs in.

Well thanks alot! I just did what you told me to and completly ruined my friodur!

he he

You lapped the chinese 12K on the DMT right? Some people selling them say they don't have to be lapped, but that is not my experience. I have lapped mine on successively finer grades of wet and dry until the surface is quite smooth, if not polished. I have tried three now, one was marbled with dark lines, one uniform and one had a few light lighter quartz-looking lines in it (don't know the composition, but thats how it looked). All three were fine in use - after lapping. I reckon the DMT is too rough - I have tried using it and noticed lots of striations and scratch marks, so proceeded with 400, 600 and 1200 w&d paper.

What do you use to raise a slurry? Any natural or synthetic slurry stone with less than the grit size of the chinese stone won't help - but I'd guess you use your DMT, which doesn't leave particles so should be fine, apart from scratching the surface of the stone.

Like loueedacat says, you may have got a lemon. I've read of soft ones. They are natural stones after all - the sediment that was laid down must peter-out somewhere, who decides where the end of a particular vein is?

Regards,
Neil

I bought a small piece of the 12k from ChrisL to use as a slurry stone, and yes there is a lot of scratch marks in the surface from the dmt.hmmm..that could be a part of the problem.Thanks

The problem is that you lapped it with the DMT and nothing finer after that. Doing so will result in a "grabby" surface texture. No matter what I use to flatten a hone I then always use a finer set of grits after that and finish with a 1000 grit.

The diamond hones are very effective but leave deep scratches. After using the DMT 325 then use a 320 grit sandpaper, then a 600 grit and finish with 1000 grit.

Hope this helps,

I agree with Randy & Neil that the rough surface is the culprit. I lapped my Chinese 12K up to 2K on wet/dry sandpaper. The surface is very smooth, and produces great results on my razors.

Originally Posted by Neil Miller

What do you use to raise a slurry? Any natural or synthetic slurry stone with less than the grit size of the chinese stone won't help - but I'd guess you use your DMT, which doesn't leave particles so should be fine, apart from scratching the surface of the stone.

Hi gents,

I scratched my DMT. I tried re-lapping it, but the scratches remained there.
Do I need to worry?

Thanks

How did you try to "re-lap" your DMT? Do you you mean running a chisel blade over it?

I assume the only way you need to worry is if it leaves scratches in either your hone you are using it to lap or your blade if you are using it to set a bevel. Have you seen any of that yet? If the scratch is just a region without any diamonds, I'd guess it will be fine. If the scratch caused diamonds to come up from the substrate, odds are those diamonds will fall out soon.