Food Safe Glazes
Which glazes can go on a mug, which belong on the outside only, and how to keep a good rating from going bad.
- Glazes
- 640
- Makers
- 7
- Studio favorites
- 81
- Good on texture
- 212
This is the question behind almost every functional pot anyone makes here, and until now the Bible only answered it one glaze at a time. So here is the whole class shelf, sorted by the answer.
A word about what food safe means, because it is looser than it sounds. Makers test a glaze as a material, fired to their specification on their clay. What comes out of our kiln is your glaze, on your clay, at your thickness, in our schedule. The rating tells you the recipe is sound. It does not certify your pot.
Three things void a good rating no matter what the jar says. Crazing, that fine web of cracks, gives bacteria somewhere to live and lets liquid reach the clay. Underfiring leaves the glaze not properly melted. And a thin or crawled coat leaves bare clay where you thought there was glaze.
Two things are deliberately not on this page. Raku is never food safe and has its own collection. So are the low-fire crystal glazes we keep for raku firings. Nothing here is decorative-only, which is the good news: almost everything on the class shelf can go on a pot you eat from, as long as you fire it properly.
The safe habit costs nothing: a rated glaze on any surface that touches food or lips, anything you like on the outside, and no crazed pot in the cupboard.
Every one we stock
Grouped by maker. Every tile is one we fired ourselves.
Rated for functional ware
509Rated by their makers for functional ware. Still your job to fire them properly and check for crazing.

The liner rule, and why it solves almost everything
You do not have to choose between a safe pot and an interesting one. Glaze the inside with a proven liner and the outside with whatever you like, and you get both.
That one habit removes most of the risk from most of the shelf. The wild reactive on the outside never touches coffee, the tested white inside does all the work, and the line where they meet at the rim reads as a deliberate design decision rather than a compromise.
We stock two liners for exactly this, a gloss and a satin white.
Common questions
Does food safe mean the maker guarantees my pot?
No. It means the recipe tested sound. Your clay, your thickness and your firing are still yours.
What is crazing and why does it matter?
A fine web of cracks in the glaze. It gives bacteria a home and lets liquid reach the clay, and it voids a food safe rating no matter what the jar says.
Can I put a decorative glaze on the outside of a mug?
Usually yes, if the inside and rim are a rated glaze. Check the glaze page, because a few run onto surfaces you did not intend.
Are these dishwasher safe?
Follow each glaze page. Dishwasher and microwave ratings are separate from food safety and not always the same answer.
Why is a glaze I use all the time not in the first group?
Either its maker gave a narrower rating than you expect, or its notes do not state one clearly. The glaze page has the full wording.
What about raku?
Never food safe, and it is not on this page. Raku has its own collection.
Simplest safe habit?
Rated glaze on anything that touches food or lips, anything you like on the outside.
The short version: a liner inside, whatever you want outside, and no crazed pot in the cupboard.
Also worth a look
About these images and what your pot will actually look like
We have done our best to represent every glaze here accurately, and you should still expect your pot to look different from what is on this screen.
Our glaze tile images are digitally created. They are built to show the character of a glaze, not to be a color match.
A screen is not a printout, a printout is not a test tile, and a test tile is not a finished pot. Each step in that chain shifts what a glaze looks like, sometimes a lot.
On top of that, the pottery itself changes the result: the clay body, how thick the glaze went on, whether it was brushed, dipped or sprayed, what was layered under or over it, where the piece sat in the kiln, how hot that spot ran, how fast it cooled, what was fired next to it, and how much texture the surface had. Two pots glazed from the same jar on the same day can come out different.
Treat every image here as a starting point, and treat a test tile fired on your own clay as the real answer.































































































































































































































































































































































































































































































































































































































































































































































































































































































































































