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8

After doing a google search, I found this excellent, well sourced piece from the OU. According to the article, written by rabbi Dovid Bistricer, poskim fall on both sides of the issue. Those in favor of using microscopes to "change" the halacha: R' Yaakov Emden (She'ilas Yaavetz 2:124) allowed microscopes to check for insects in rice, forbidding that ...


8

Shulchan Aruch Yoreh Deah 298:1 אין אסור משום כלאים, אלא צמר רחלים ואילים עם פשתן. אבל צמר גמלים וצמר ארנבים ונוצה של עזים וכל שאר מינים, מותרים בפשתן. The only thing forbidden because of Shaatnez is sheep and ram wool with linen; camel wool, rabbit wool, goat hair, or other similar items are permitted with linen. The rule that only sheep and ram ...


7

Per Shatnez Testers of America and Chabad.org no. When we speak of wool, we are only referring to wool obtained from sheep or lambs. Other materials, such as camel's hair, mohair, angora, cashmere or alpaca wool, present no shatnez problems.


7

An individual's mezuzah has to be checked twice in seven years. A community's mezuzah has to be checked twice in fifty years. Yoreh Deah 291:1. You have to check them even if you don't assume they are pasul. In fact, even if you check three mezuzos, you still have to check all of the others (Pischei Teshuvah 291:1).


6

Halacha does not require us to check for bugs unless a product has a halachic certainty of having bugs (chazaka- which may require checking mideoraisa) or commonly has bugs (matzui, which requires checking miderabanan). The best possible method to do a large amount of lettuce is to create a halachic certainty that there are no bugs (a chazaka) by checking 3 ...


6

Here is an article that discusses checking tefillin. See the article for more details and sources: Once Tefillin are known to be Kosher, they Halachically never need to be checked, assuming they are worn regularly. If they are worn infrequently they must be checked 2 times in 7 years. Shulchan Aruch (Orech Chaim 39:10) However, the Aruch Hashulchan says ...


5

http://www.shemayisrael.com/parsha/feinhandler/archives/chayeisa.htm The Chofetz Chaim sighed deeply and said, "I too am a person who makes mistakes. You know that I sell my books. Sometimes the binder misplaces a page, or a page might be missing or have unclear print. Even though I am careful to check every book before it is sold, there still ...


5

According to strict Halacha, Tefilin does not have to be inspected ever. Proof of this is a Yerushalmi Eruvin 59 Halacha 2 from Hillel Hazakain. In the Teshuvos HaGeonim it says that so long it is being used constantly there is no need to check, however if it is only used from time to time it should be checked twice every 7 years like Mezuzus. HaRav ...


5

About bugs - the halacha is that you cant eat it if it is large enough to be visible to the naked eye. This is regardless of whether it is camouflaged or hidden. If a mashgiach can see a small black spec that could be a piece of dirt, or could be a bug. It is large enough to be visible, so if it is a bug, then you can't eat it (and a light box or ...


5

I know that R' Avraham Blumenkrantz zt"l wrote very sharply (in his annual Pesach guide) against what he called the "commercialization" of checking for bugs, the standards for which, he argued, are inadequate. With that said, though, it may just depend on whether you have the necessary qualities (patience and sharpness of eyesight, among others) to do a ...


5

The Mishna in Kelayim Perek 9 says that those that sell Shatnez are allowed to try it on in order to model it to the Purchaser. According to this Shita you would be allowed to try it on prior to purchasing. However we do not Pasken like that. The Heter to try it on is based on Rov, since most clothing is not Shatnez, and as it is not yours you can not check ...


4

http://shatnez.n3.net/ Here are a few: Carpets/Rugs: May require testing. Wool carpets (wall-to-wall) and area rugs may be backed or reinforced with linen. Non-woolen rugs and carpets are not a problem. Services are available at most shatnez laboratories for those who wish to have their carpets tested. Linen and Linen-look fabrics: Require testing. ...


4

The Biur Halacha says you must make a new beracha because since you make the tefilin invalid in the process of checking the parshiyos this is considered a hefsek (interruption) in the mitzvah.


4

See this answer. Those rabbis who prohibit aborting a fetus even if it has Downs, Tay-Sachs, or the like, strongly frown upon testing for such things if there's nothing you can do about it -- or you'll put yourself in a situation where it will take superhuman strength to follow halacha.


4

This depends on the Hashgacha. Some Hashgachot on broccoli are only signing off on the purposefully present ingredients and processing equipment, but are not addressing the requirement for Bedika (Triangle-K for example on a lot of frozen produce (See here)). Others are signing off that they indeed already performed a Bedika (typically via Chazaka) and ...


3

Nitei Gavriel Hilchos Nesuin Volume 2 Chapter 61 mentions this Minhag in the name of the Shela.


3

The Aruch HaShulchan (291:1) says that in a place which is exposed to the elements and moisture or rot are common, one should check more often than twice in seven years and at least once a year. He notes that this was his personal practice.


3

Read the section in Shimushah Shel Torah dealing with it. (It's illustrated.)


3

of course yes, like you mentioned before: the torah was given to human beings not to angels. in our case it means that the kind of bug that is forbidden is the one the human can see. If you hold that you need to check with a utensil, someone using an microscope wouldn't eat anything.


3

The unequivocable answer is - no! if they can not be seen by the naked eye, they are not considered to exist period. Interesting I just saw another great article by the author of the photogrey issue on this exact topic - with dozens (if not more) of sources - here's the link - http://ohr.edu/this_week/insights_into_halacha/5043 this rabbi spitz must really ...


3

I think generally speaking, if you'd reasonably believe it could contain wool or linen. I heard something about baseball mitts being a problem? Anyone hear of this? From what I've heard, a garment that's entirely cotton and/or synthetic is incredibly unlikely to contain both wool and linen (but men's suits could still have lining or padding or the like ...


3

Rav Aaron Abadi writes: "Don't listen to the rumors. There is no need to check for Shaatnez on any article of clothing unless you're sure there's shaatnez in there. For all those who need to know.... Shaatnez according to some Rishonim requires "Shua, Tavi, and Nuz all together." We don't have that today. So according to those Rishonim, today's Shaatnez is ...


3

Although the other answers mentioned that cashmere may be mixed with linen as it comes from the Kashmir goat, practically this is not true. That is because cashmere by itself is a very expensive material. Each goat can only produce about 4 ounces of fibers a year and it is estimated that fleece from 4 to 6 animals would be needed for a sweater. Because of ...


3

FWIW, in Eretz Yisroel, there are vacuum packed bags of grains under Badatz supervision. They tend to be slightly more expensive but are "נקי מחשש תולעים". I saw some in stores near the Mir (in the Beit Yisrael neighborhood of Jerusalem), and would guess they're widely available in chareidi neighborhoods. If your concern is to prevent bugs being born in ...


2

I think the accepted opinion holds that by an issur one should be choshesh for a "miut ha'motzoi", which I think R.H. Schachter defines as around 10%. So if you think the suit has a greater than 10% chance of being shatnez, you should get it checked. If so, I think only certain higher-end wool suits would be an issue. Some might hold one should check it even ...


2

He would have to check it if he is going to make a bracha on it. One solution to this problem is too declare ownerless your share in the Shul's tallit thereby making the tallit a borrowed tallit which is not obligated in tzitzit. This way it doesn't matter if they are invalid and you won't be making a bracha anyway. (Sources: Mishna Brurah 13 sk 15, 8 sk ...


2

As always, CYLOR. But here's what I found while looking around the web: From here: 330. The outside leaves of lettuce which are not fit for eating may be taken off on Shabbos in order to reach the good leaves, provided that this is done just before the meal. Lettuce leaves may be examined on Shabbos to make sure there are no insects on them. Insects ...


2

As Rav Herchel Schachter notes at approximately the 26:30 mark in this shiur, Rav Shlomo Zalman Aurbach clarified the halacha of checking twice every seven years, that it is not the case nowadays. The twice-in-seven-years requirement was stated when the situation was heat extremes. But nowadays, where we have air conditioning in the summer and steam in the ...


1

I have come across a minhag to check one's mezzuzos every leap year in Adar Sheini. The reason for this custom is in order to ensure they are checked twice in seven years. The Minhag is brought in אוצר טעמי המנהגים ח"ב עמ' שצו quoting בית ברוך ח"ב קונטרס המזוזה סי' רצא סע"ג.



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