If you notice a few tiny black dots on the surface of your Ou Kiln celadon, please don’t worry — this is not a defect, but a natural and normal result of traditional high-temperature firing.
Where do these black dots come from?
Ou Kiln celadon is made from natural mineral clay, which contains trace amounts of iron.
Although the iron content is very low, it is never completely zero when working with raw, unrefined materials.
During firing at temperatures of approximately 1250–1300°C, small amounts of iron may migrate and react within the glaze. As the piece cools, a tiny portion of these mineral particles can appear on the glaze surface as fine, scattered black dots.
This process is:
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Natural
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Random
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Impossible to fully control or replicate
It is a characteristic of handcrafted, kiln-fired ceramics, not industrial mass production.
Is this considered a flaw?
No.
In traditional ceramics, these marks are often described as natural kiln marks.
They do not affect:
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Safety
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Durability
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Taste of tea or daily use
Instead, they reflect the reality that each piece has gone through an authentic firing process using natural materials. No two pieces are ever exactly the same.
Our quality control standards
Before shipping, every piece is carefully inspected by hand.
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Pieces with excessive impurities or visually distracting marks are rejected
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Only items that meet our aesthetic and functional standards are approved for sale
That said, due to the nature of handmade ceramics, a very small number of pieces may still show one or two subtle black dots. This is considered acceptable and normal within traditional celadon craftsmanship.
What if you are not comfortable with this?
We respect that every customer has different expectations.
If you are not fully satisfied with your purchase, we offer:
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Free exchange (subject to availability)
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30-day returns and refunds
No complicated process. Your satisfaction always comes first.
Our philosophy
The beauty of Ou Kiln celadon does not come from artificial perfection.
It comes from the dialogue between earth, fire, and glaze.
These subtle traces are not imperfections — they are evidence of authenticity, craftsmanship, and the natural process behind every piece.