Sharpening a ceramic knife?

[Ian_Edwards]

A few years ago I bought a ceramic knife to cut dyneema with. The knife has lost it's edge , through use and abuse and it needs sharpening.
I've tried sharpening it on an oil stone in the same way I'd sharpen a conventional knife, but it has had little or know effect.
Has anyone out there successfully sharpen a ceramic knife? And if you have how did you do it?
Cheers
Ian

 

[Leighb]

Just a guess, but perhaps a diamond coated whetstone?

 

[Alex_Blackwood]

A few years ago I bought a ceramic knife to cut dyneema with. The knife has lost it's edge , through use and abuse and it needs sharpening.
I've tried sharpening it on an oil stone in the same way I'd sharpen a conventional knife, but it has had little or know effect.
Has anyone out there successfully sharpen a ceramic knife? And if you have how did you do it?
Cheers
Ian

Sharpening a ceramic knife - Google Search

 

[ryanroberts]

I have a battery operated diamond grinder job. Very hard to restore the original light sabre levels of sharpness, I went back to steel kitchen knives because of this.

 

[GHA]

No help re the ceramic I'm afraid, though with dyneema I've found splashing out a quid of so on a carton of stanley knife blades now and again works - blade only lasts a handful of cuts but least there's always sharp ones nearby.

 

[Roberto]

For ceramic knives, I bought a (very expensive) rotating diamond wheels sharpening machine: it works well but it trims out a significant amount of material. In all, after the final sharpenings I will not bother using ceramic knives again, be it for home kitchen or onboard.
For dyneema, if you can use a knife then something on the lines of Opinel works well, sharpened every now and then; if you need scissors then those used by optic fiber installators are excellent (check they cut through kevlar), price £10-15, available in short/long blades.