From my understanding, the dough becomes chametz if it is not baked within 18 minutes. So, aren't all matzot 18 minutes? Like the words of the seder, what makes the "18 minute" matzot different from all other (non shmurah) matzot?
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Many think dough doesn't necessarily become chametz after 18 minutes– Double AA ♦Mar 17, 2015 at 2:51
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@DoubleAA - is this a common opinion, now?– DanFMar 17, 2015 at 2:57
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I think it's just marketing/another way of saying it's not chametz...– LoewianMar 17, 2015 at 3:02
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(There are plenty of chametz/non-kosher for passover matzot on the market for the rest of the year)– LoewianMar 17, 2015 at 3:03
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Perhaps בצק החרש אם יש כיוצא בו שהחמיץ הרי זה אסור: גמ' אם אין שם כיוצא בו מהו א"ר אבהו אמר ר' שמעון בן לקיש כדי שילך אדם ממגדל נוניא לטבריא מיל ונימא מיל הא קמ"ל דשיעורא דמיל כממגדל נוניא ועד טבריא– ertert3terteMar 17, 2015 at 3:41
1 Answer
In current matzah parlance, “18-minute matzah” means that the entire matzah line is cleaned every 18 minutes
https://oukosher.org/passover/articles/getting-to-know-your-matzah/