- Halacha
- Kashering Dishes
Kashering China
Question
If one placed the china in a kiln which was brought up to the standard temperature used to produce the china, would that not negate any non-kosher or even any milk-meat essences and basically be as if the china was just produced? If a Jew did this, would it even require immersion in a mikva?
Of course, there is a distinct possibilty that the china finish could be negatively impacted, but I can’t say this from any experience, just conjecture.
Answer
Shalom,
Thank you for your question. There is much Rabbinic discussion about koshering china and clay vessels by returning them to the furnace. The ruling of the Shulchan Aruch (Orech Haim, 551,1) is that one may kosher such vessels by returning them to the furnace they were fired up in (but the heat of a regular oven would not suffice). You are correct that there is a danger that the vessel will crack in the process.
Even if a Jew refurnaced the vessel it would not be considered that a Jew had manufactured it, just that they had koshered it, and so it would still need immersion in a mikvah if made by a non-Jew.
Blessings.

Kashering a Breadmaker
Various Rabbis | Shevat 29, 5768

Milchig and Fleishig Dishwasher
Rabbi Yoel Lieberman | Kislev 1, 5781

Over One Year Old Treif Dishes
Rabbi Eliezer S. Weisz | 2 Iyyar 5763

Metal Slow Cooker
Rabbi Yoel Lieberman | Av 17, 5776

Rabbi David Sperling

Jewish Status
Nisan 23, 5771

Hearing the megillah in Israel
Adar II 7, 5771

Tashlumin on Rosh Chodesh
Iyyar 7, 5771

Wallet on Shabbat
Adar II 24, 5771

selling chametz - uncooked oats?
Rabbi Yoel Lieberman | Nisan 7, 5770

Selling flour for pesach
Rabbi David Sperling | Adar II 26, 5774
Genesis 24: 2-9 – Put your hand under my thigh
Rabbi Moshe Leib Halberstadt | Tevet 26, 5770

Selling Hametz on Passover
Rabbi David Sperling | Adar 11, 5777
Cooking on Shabbos
Rabbi Daniel Kirsch | Adar 23, 5783

Negel Vaser for Babies
Rabbi Yoel Lieberman | Adar 24, 5783

Who is included in anti-Semitism?
Rabbi Ari Shvat | Adar 16, 5783
