Jump to content
I Forge Iron

clay tempering?

Recommended Posts

Hi, I have a problem.

I tried regular clay, from the dirt.
then raiku clay,which is probably a broad general term.
then mixtures of charcoal, ash, and clay.
and now a mixture of charcoal, ash, clay, and borax.

I can't get the dried clay to stay on the steel, it "pops" off.
I have a propane forge. should I try with charcoal.

Is it the wrong mixture? should I just try to find a tempering clay.

what am I doing wrong?

Link to comment
Share on other sites

Try Rutland furnace cement from the hardware store. It's awfully sticky stuff. A lot of folks, including me, have had decent luck with it.

If you want to use natural clays, try adding some grog -- stuff that won't absorb water, and so won't shrink as it dries -- to the mix. Clean play sand will work. Go at least 1:1 grog to clay. If that doesn't work, go to 2:1 or even higher. Pure clay shrinks a great deal as it dries, and that'll cause all kinds of problems.

Link to comment
Share on other sites

another thought, how polished is the blade when you apply the clay? I normally leave a slightly rough (say 200grit) surface so that the clay sticks a bit better. I also degrease it just to be sure. With some clays I've had beeter luck applying a slip first and once that is dry, applying the main lumps of clay.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...