# Can You Microwave and Dishwash Handmade Pottery?

Cluster: Glazing & Surface Design
URL: https://claybook.studio/blog/handmade-pottery-microwave-dishwasher-safe/

# Can You Microwave and Dishwash Handmade Pottery?

You love your handmade mug. Can it go in the dishwasher? Can you reheat coffee in it? The answer is often yes, but not always, and you should know why before you find out the hard way.

This guide is about durability. It is separate from whether a glaze is safe to eat from, which we cover in [is my pottery food safe](/blog/is-my-pottery-food-safe/).

## What makes a pot durable

* **A fully matured clay body.** Stoneware and porcelain fired to their proper cone become dense and strong. Underfired clay stays porous and weak.
* **A well-fitting glaze.** No crazing, no pinholes, no bare patches inside. See [the glaze defect guide](/blog/glaze-defects-guide/).
* **A smooth, even surface** that can be cleaned.
* **No decoration that is easily damaged,** such as soft overglaze or luster.

## Dishwasher

Many well-made stoneware and porcelain pieces survive years of dishwashing. Problems come from:

* **Crazed or unfired glazes** that absorb water and break down.
* **Earthenware or porous clay** that soaks up detergent and moisture.
* **Gold, platinum and luster** that wear away with abrasive detergent.
* **Matte or soft surfaces** that can scratch or dull.
* **Delicate handles and thin rims** that can chip against other dishes.

If you are not sure, wash by hand. Fragile or valuable pieces deserve it anyway.

## Microwave

Most vitrified pottery (stoneware, porcelain) is fine in the microwave. Trouble comes from:

* **Porous clay** that absorbs water and then heats unevenly, creating stress and cracks.
* **Metallic glazes and decoration** that can arc or spark.
* **Hairline cracks** that trap moisture.
* **Very thick or uneven walls** that heat at different rates.
* **Hot handles.** Some mugs get hot spots, so test before relying on them.

### A simple microwave test

Place the empty pot in the microwave next to a cup of water, heat for 30 to 60 seconds and touch both carefully. If the pot is hot but the water is only warm, the pot is absorbing microwave energy, so don't use it in the microwave. If the pot stays cool or is slightly warm from the water, it is likely fine.

Stop immediately if you see sparks.

## Oven, freezer and temperature changes

Rapid temperature changes stress pottery. Don't take a mug from the freezer to a hot oven, or pour boiling water into a very cold pot. Unless a piece is made and labeled for ovenware, assume it should not go in a hot oven.

## What to tell buyers

If you sell your work, write a clear care note. Be honest and specific. For example:

* "Dishwasher and microwave safe" only if you have tested that clay and glaze combination.
* "Hand wash recommended" when you are unsure or the finish is delicate.
* "Decorative only, not for food" for raku, pit-fired and similar work. See [raku firing explained](/blog/raku-firing-explained/).

A card in the box with care instructions protects both the pot and your reputation.

## Test your own work

The best evidence is your own testing. Run a sample piece through 20 dishwasher cycles and a few microwave trials, then check for dulling, crazing or cracks. Keep notes of each clay, glaze and firing, so you know which combinations hold up. A pottery log in Claybook makes that easy.