Can I eat from a kintsugi-repaired bowl?

Yes, if the repair uses urushi lacquer and pure gold and the lacquer is fully cured. Avoid abrasive scrubbing, dishwashers, and prolonged soaking. Hand wash with warm water and a soft cloth.

What materials are required for food-safe kintsugi?

Pure urushi lacquer (from the Toxicodendron vernicifluum tree), wheat-flour paste or tonoko stone powder as a filler, and 23k or 24k pure gold powder applied to the cured lacquer line. Synthetic epoxies, brass powders, and mica pigments are not food safe.

How long until a kintsugi repair is safe to eat from?

Urushi cures slowly through humidity, not air. A traditional repair needs four to six weeks in a humid cabinet (muro) before the lacquer is fully polymerised and the piece is safe for food contact.

Studio guide · Kintsugi

Is kintsugi food safe?

Q: Is kintsugi food safe?

Yes — traditional kintsugi repair is food safe once the urushi lacquer has fully cured (typically four to six weeks). The lacquer is sealed under a thin line of pure 23–24k gold, both of which are inert and non-toxic. Epoxy or brass-powder repairs are not food safe and should be treated as decorative only.

The short answer: yes, when it is done in the traditional way. A bowl repaired with urushi lacquer and pure gold can be eaten from, washed, and lived with for generations. A bowl repaired with epoxy and brass-coloured powder cannot.

The traditional method is food safe

Authentic kintsugi (金継ぎ) uses urushi, a sap-based lacquer harvested from the Toxicodendron vernicifluum tree. Once cured, urushi is inert: it does not leach, does not react with food acids, and has been used to seal Japanese rice bowls, soup lacquerware and tea utensils for more than a thousand years. The visible gold line on top is pure 23k or 24k powder — also inert, also food safe.

Modern epoxy repairs are not

Most "kintsugi kits" sold online use two-part epoxy resin and brass or mica powder. The result looks similar but is not food safe. Epoxies are only certified for food contact under very narrow industrial conditions, and brass leaches small amounts of copper and zinc into acidic or hot foods. Treat epoxy repairs as decorative only.

How a food-safe kintsugi repair is made

The break edges are cleaned and joined with mugi-urushi — urushi mixed with wheat-flour paste.
Gaps are filled with sabi, a paste of urushi and tonoko stone powder, then sanded smooth.
The seam is painted with a layer of red bengara urushi.
Before that layer fully cures, pure gold powder is dusted onto the tacky lacquer.
The piece rests in a humid cabinet (a muro) for four to six weeks while the lacquer polymerises.

Care of a kintsugi-repaired piece

Hand wash only. No dishwasher, no abrasive sponges.
Avoid prolonged soaking in hot water.
Avoid the microwave — gold is metal, and sudden heat stresses old ceramic.
Refresh the gold line every few decades if it begins to dull.

Why this matters at the studio

Kintsugi Gallery's founder, Denys Rzhavskyi, learned 金継ぎ as a working principle: that the seam is part of the object, not a flaw to hide. We repair commissioned pieces in the traditional way — urushi, tonoko, pure gold — so that what comes back to the table can still hold rice, soup, and tea.

For commissions, write to hello@kintsugi.gallery.

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