I have a bunch of kintsugi stuff in regular use so I can answer. Microwave is a definite no! It arcs, kind of like gold-rimmed plates would I guess. Dishwasher

I have a bunch of kintsugi stuff in regular use so I can answer. Microwave is a definite no! It arcs, kind of like gold-rimmed plates would I guess. Dishwasher you can. The repair is really two parts: the bond that holds it together and the gold dust that covers the lacquer. The join bond can handle the dishwasher. The gold layer needs touchup every few years anyway, but it will need it a lot more often if it goes through the dishwasher regularly. Gold is expensive. There are some other ways of applying the gold that can hold up better, but they're less common.