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Kashering of corelle dishes

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Rabbi David Sperling

Kislev 6, 5782
Question
My mother in law had a caregiver for the last 4 years. Until she came my mother in law had a kosher home. We tried to explain everything to the care giver so that her home would remain kosher. She had 2 sets of corelle dishes. One for meat and one for dairy. Most of those dishes were not used by the caregiver except for 2 plates and 2 bowls. We think we know which ones they are but we are not 100%. Are we allowd to use these dishes? what do we have to do to them to make them usable.
Answer
Shalom, Thank you for your question. Firstly, if the doubt about the dishes is that they were used for foods that were not hot, ie they were not to hot to be held in one's hand, then all is totally fine, as non kosher taste cannot enter a vessel if not hot. Next, there are opinions that Corningware is a form of glass, and as such does not absorb nonkoaher tastes, and thus all would be fine also, even if they were used for hot nonkosher foods. Lastly, even if the dishes were made not kosher, if they have now been mixed with other dishes, we use a principle of nullification of mixtures, and rule that the majority of kosher vessels nullifies the minority of nonkosher ones. With all this in mind, it seems as if your situation allows us to rule that all the dishes are kosher. Blessings
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