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If one holds that chadash is assur chutz l'aaretz (or is in Israel), and accidentally cooked a chadash product, would the taam of the chadash that is absorbed in the keilim be a concern, and would you need to kasher the keilim?

  • Hi user8613. Why would this be different from any other prohibited food? Of course non-Kosher food can mess up your pots. Please edit your question to clarify, as right now it doesn't seem very interesting at all. – Double AA Nov 7 '16 at 17:07
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Among those who only eat yoshon even in the diaspora, some are only strict about the actual food, while others are strict even about the keilim (vessels and implements).

Source: Rabbi Joseph Herman, who is a good friend of mine, and in whose home I've eaten on numerous occasions. He brought up the idea of keeping yoshon in America to Rabbi Yaakov Kamenetsky. He himself is only strict about the food itself.

I do not have a first-hand source about being in Eretz Yisroel. In any case, and as always, CYLOR.

  • I believe R Herman brought up the idea to R Moshe Feinstein as well. He's listed as the asker in Igros Moshe hebrewbooks.org/pdfpager.aspx?req=922&st=&pgnum=311. – Double AA Nov 7 '16 at 21:36
  • It may be worth noting if some are lenient about vessels even when they are Ben Yomo, or if the leniency is only for Eino Ben Yomo. It's hard to see how one could be lenient on a Ben Yomo pot. – Double AA Nov 7 '16 at 23:09
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    You can wait until the bliot would be yoshon – kouty Nov 9 '16 at 3:56
  • @kouty, so you want to say it's yesh lo matirin? Doubtless that's already been discussed in the relevant sources (though I haven't learned most of them). – msh210 Nov 10 '16 at 7:04
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    @msh210 Chadash is a classic example of Yesh Lo Mattirin hebrewbooks.org/… – Double AA Nov 10 '16 at 13:03
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See Mishna Berura 489:48 that says that even those who are Machmir on Yoshon don't need to be concerned for Bliyos in Keilim unless you are 100% sure that the food is Chodash (which is the case less than 5% of the time*) and the pot is Ben Yomo.

There were many who argued, most famously the Shaagas Aryeh, but the Minhag is like the Mishna Berura

*Speaking from experience as someone who has kept Yoshon since a month after I got married and a regular user of Rabbi Herman's yoshon guide (who actually understands how to use it unlike most people who comment about it) I have never came across anything commercially that was Vadai Chodosh so far.

  • What is so complicated about using it that only you've figured out? It seems pretty straightforward: use the date codes to find when it was produced and if it was produced after a certain date it could be Chodosh. – Double AA Nov 10 '16 at 5:58
  • I didn't say it was complicated to use. I said people misunderstand it. The dates that he gives are based on the earliest dates that anything could possibly be Chadash. The odds of anything being Chadash on that very day are very small. That's just when the first new grain starts shipping. Even four months later you're still running a slight chance that your product may be Yoshon. – Eliyahu Nov 10 '16 at 7:31
  • I didn't either say only I've figured it out . All I meant was that I and most other people who use the guide regularly understand how it works unlike many Rabbanim who comment about it but don't keep Yoshon and therefore have never actually used the guide. – Eliyahu Nov 10 '16 at 7:32
  • If "Even four months later you're still running a slight chance that your product may be Yoshon" then how do you figure 5% is Vadai Chodosh? Do you mean a package date four months later or a purchase date four months later? – Double AA Nov 10 '16 at 13:00
  • I wrote less than 5% and I clarified that that was just to say it almost never happens and I personally have never experienced it. I don't want to say it never happens as it may happen in some rare cases. I meant packag date. And in terms of the four months: that wasn't an exact number. I could have said six months later. – Eliyahu Nov 13 '16 at 4:19

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