Thread: Opinion wanted on these stones

Originally Posted by izlat

I have no idea - but this is very interesting.

Can't you have the grit checked?

What can I say, take a cheapie but quality blade, loupe / microscope - do a few passes - take a look at the marks, if you're brave - test-shave a small area. Repeat as necessary until you feel comfortable in your understanding if the stones are good for razors or not

Good luck
Ivo

Thanks.

A flooded basement and problems with central heating have distracted me somewhat, but I am still trying to figure out how to lap these things.
They need it, if only to remove 15 years of accumulated dust and dirt.
Underneath that they are as white as milk.

I don't want to cut them up just yet, but how would you lap a stone that weighs about 8 kg and is almost as large as your average sheet of sandpaper?

Originally Posted by Bruno

I don't want to cut them up just yet, but how would you lap a stone that weighs about 8 kg and is almost as large as your average sheet of sandpaper?

How about the easiest: lapping each other (I know it's pretty obvious but should work?)

Cheers
Ivo

Find a flat area and try to hone a knife first to see how it cuts and what finish it leaves to the edge.

PuFF

If you look at this page of wikipedia:

http://en.wikipedia.org/wiki/Lithogr..._early_process

It says that early lithography used limestone.

Here too you get pretty much an idea as to how it works and what sort of stones lithography uses:

http://www.howstuffworks.com/stone-lithography2.htm

Originally Posted by Kees

If you look at this page of wikipedia:

http://en.wikipedia.org/wiki/Lithogr..._early_process

It says that early lithography used limestone.

Here too you get pretty much an idea as to how it works and what sort of stones lithography uses:

http://www.howstuffworks.com/stone-lithography2.htm

Thanks for the links.

If those are indeed limestone, I suspect they are not overly expensive (couple of 100s for a new stone similar to mine.)

If the knife test turns out Ok I might have them cut into norton sized blocks for convenience.

Originally Posted by PuFFaH

Find a flat area and try to hone a knife first to see how it cuts and what finish it leaves to the edge.

PuFF

I hadn't thought of that. Good call.
If the finish on say a kitchen knife is not excellent, I know I don't have to try using it for razors.