Eli5: Why shouldn’t you put home made ceramics (a mug, for example) through the dishwasher? If they can withstand the heat of a kiln, surely a dishwasher is fine?

Question

I mean, I put them through the dishwasher sometimes anyway, but I’m told I shouldn’t? 🤷🏻‍♀️

In: 5331

Answer 1

Here is a simple answer:

Never risk an item in the dishwasher that can’t easily be replaced.

Detergents, dishwasher water jets, dishwasher or plumbing malfunctions, loose glasses or other dishes hitting things, or even just high powered water jets can break down enamel, glaze, or cause fractures in the material. Dishwasher water jets are tiny power washers – you shouldn’t power wash materials that can be damaged by intense pressure mixed with temperature changes and heat.

There are also different types of clay and unless you know what was used, you can’t be sure that a material is safe under your dishwasher’s conditions. It might be fine once then break, but it will definitely shorten the lifetime of that product.

High heat once may harden a piece, but regular high heat and exposure to water can degrade materials.

If you value something, hand wash it gently to ensure care and longevity.

Ever had a handle break off of a mug? Or maybe a microfracture form on the rim of your favorite bowl? All of that can be from your dishwasher.