Chapter 1: What is the main topic discussed in this episode?
Okay, good afternoon everybody. So as Pesach is coming closer, there's a lot of questions that people face regarding kashering things.
Chapter 2: What questions arise about kashering as Pesach approaches?
I don't get so many questions about kashering kalim anymore because people just have Pesach kalim. But kashering kitchens in general, about kashering appliances and things like that. We're not going to go through all of that right now, how to kasher an oven, how to kasher this. But maybe some generalities about what types of materials can and cannot be kashered.
You hear people sometimes make sweeping statements about glass, about plastic, and porcelain, and pyrex. So maybe just to go through material by material, what can be kashrut, what cannot be kashrut, from a Pesach perspective, from an all-year-round perspective. So one thing is clear, when the Torah talks about Adalas Kehlim in Sefer B'midbar, it talks about metal Kehlim.
So obviously metal can be kashrut. That's a pasuk. So that we don't need to discuss very much. The Pasukin Vayikra, Parikha Pasuk Vav, tells us, that when you cook kadshim, when you cook a karban, in a kli keres, you have no choice but to break that kli. Because any blia of a karban that's in a kli, at some point, is going to become nosar.
Once the Zman Achila for that Karban runs out, the Blios in the Kli are Nosar and they therefore become Asar. And apparently, there's no way to kasher the Kli. The only Tikkun you have for the Kli is Shvira. And the Gemara explains that the basis for the reason for this is...
that klicheres have the capacity to be bolea, they can absorb flavor, they can even expel flavor, but you can never be guaranteed that you've gotten all of the flavor out of a klicheres. So even if you did agala on the klicheres a hundred times, but it could be the next time you cook in that klicheres, there is still some more blios that are going to come out and are going to impact your food.
However, there is one type of kashring that works for everything, and that is libel chamor, that if you do a real kashring,
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Chapter 3: What materials are generally discussed in relation to kashering?
direct fire type of kashring that should work on klicharas as well. However, Chazalberg goes that we don't do that on klicharas because we're afraid that a person is not going to do a proper kind of libon since the klicharas could break under such intense heat pressure. I wonder if we should make a similar gezerah with self-cleaning ovens.
I've found in recent years, based on the shaylas that I'm getting, that when people self-clean their oven, the oven tends to self-destruct. and the repairmen get very, very busy. But there are a lot of people that will not self-clean their oven. They'll look for any other way to kasher it. They will not self-clean it because they know that it's going to break.
But you see that mentality that Chazal were aware of, that if you're concerned that something is going to break, then you're not going to really want to do that method of kashering. And this is Paschal and Ilchus Pesach. Regardless of how you used your klicharis in the past, it does not work to do a libon.
That we're afraid you're going to have Rachmanus on the kli, you're not going to want to break it. So that is type of kli number one. Type of material number two is glass.
There is a machlokas, whether glass has a din like pottery, because it's made from sand, and therefore cannot be kashered, or if glass does not baleah at all, it doesn't absorb anything at all, and therefore is never a problem to begin with. Shulchar, churuch, pesach, taftun, alef, siv, chavav, paskins, Just rinse it off and it's fine. You don't need any on glass.
However, the Ramas says that there are those that are
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Chapter 4: Why is metal considered a safe material for kashering?
all the way in the other direction. Not only does it need to be kashered, you can't even kasher it. Not only does it become treif, there's nothing you can do about it. There's no way to solve it. It's like a klicheres. So min ha-kotzeh la-kotzeh. That Svardim are totally meichel. They assume that glass can never become treif because it's never boleah. The mitziah seems to be like the Svardim.
And Ashkenazim or Machmir, that glass is boleah that has a din like klicheres.
There is a Sefer Zerah Emes, where he says that even according to the Ramah, we could be makled to use a glass dish for meat and then milk, because he points out that in Hilchas Tamyeinam, in Hilchas Ya'in Nesach, in Siman Kuflam and Hey Siv Chas, the Shulchan Aruch Paschins, that you're allowed to use a glass klee that Ya'in Nesach had been stored in, and the Ramah doesn't argue over there.
So why didn't the Ramah argue? The Ramah should say glass is a big problem. So he suggests in the Sefer Zerah Emes, that maybe there's no reason for Pesach and Shayim Mos Hashanah. That when it comes to Pesach, it's a special chumar du chametz, that we assume glass becomes treif, but outside of chametz, we're meikel on glass. That's what he suggests.
Rav Menashe Klein has a tshuva, Mishnah Lachos, where he says, yeah, yeah, that's true when that's the minag. And the minag is by drinking glasses, that we use the same drinking glasses for fleishegs and milchegs.
And that's fine, to use the same drinking glasses by a flesh meal and a milich meal, because it's not Pesach, so we don't have the Chumar Dechametz, and Rav Rishon Amol Glass is not Baleah anyway, and drinking glasses are never a Kli Rishon to begin with, to really be Baleah. How many hot, people usually don't drink, hot meat sauce. from the drinking glasses.
They typically do not drink even hot coffees from their drinking glasses. So the whole thing is such a far-fetched concern. So he says, for drinking glasses, the minig is to be makled. But, Ramin Asher Klein says, if you have a Pyrex dish, Pyrex is glass. It's a new type of glass. That's just very strong against heat. It doesn't break under the intense pressure of the heat.
So it's a clear rishon that you cook in. You use it in the oven itself. He says that you should not use for meat and for milchik if you are Ashkenazi. Rabbi Yaakov Emdin holds that glazed china is also not baleah because it's like glass. And Rabbi Yaakov Emdin holds that glass is not baleah. He yells like the svardim, that glass is not bolea.
Rabbi Reisman tells him, I said that once someone, a newlywed guy came to Rav Palm with a brand new glazed piece of china dish and he said, we accidentally trafed this up, you know, it was fleshings and we put milk in it or vice versa, whatever it was. And so what do we do? So Rav Palm said, your family davens by Rav Bik's shul, no? And he said, yeah. So he said, you should go ask Rav Bik.
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