Jump to content

Questions about kiln shelf care


Recommended Posts

Hello! I have some questions about kiln shelf care and storage. 
— After my first glaze fire, some dark grit was left on the shelf surrounding some of my pieces. I’ll try to attach a picture. What is this? Should I scrape/sand it off? 

— I kiln-washed the shelves and fired them before firing any ware, per Skutt’s instructions. Going forward, what’s the best way to use kiln wash? I know when it gets old and flaky, you can scrape it off and reapply. Do you just re-wash the shelves, put ware on top, and bisque/glaze fire as usual? Or do the washed shelves need to be fired again before putting ware on them?

— Is it ok to store kiln shelves on their sides? Or stacked on top of each other inside the kiln? Anything else I should know about shelf storage?

These are the kinds of questions that are so basic you can’t find them online! Lol. Thanks for helping out a newbie. 

7BA5F599-F5E5-4535-9CD1-0C146AC7C7B7.jpeg

Link to post
Share on other sites

The dark grit is probably manganese or glaze or a combination of both if you used a "speckled" body.  Manganese tends to eject from the body pretty forcefully.

I don't fire my shelves alone when I rewash them.  I usually use them in a bisque firing.

Yes, you can store them on their side.

Link to post
Share on other sites

You're supposed to store them sideways, since even a slightly warped one at the bottom of a stack can crack.

I kilnwash and go straight to glaze fire.

Some dots can be poked off with a needle tool, have eye protection!

Don't store them under glazes, glaze materials, glazed pots, water, or anywhere they may adsorb water.

Face to Face bottom to bottom.

Sorce

Link to post
Share on other sites
3 hours ago, Mark C. said:

Making your own wash is far better than using commercial wash -yours looks very thin. Do a search on the main page on kiln wash

If you store them on concrete floor use a piece of wood to get them off concrete 

Mark, why do I need to get them off the concrete?  I always figured that was safer?

Link to post
Share on other sites

If your concrete is dry no problem-with my advancers they can pick up moisture from damp concrete so wood is the buffer.,Its also softer  than concrete. If you live where concrete can wick ground water  its damp and so can wick into shelves . The southwest is an area where this will not be the case.In our rainy area concrete has lots of mositure year around.

The mullite shelves do not matter near as much as advancers-but many folks do not know the differences  as there are many types of shelves.

so as a general statement I always suggest wood over concrete .

Edited by Mark C.
Link to post
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.

Guest
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...

Important Information

By using this site, you agree to our Terms of Use.