Cutting tzitzis strings

Question

I'm pretty sure I once saw the Mishna Brura talk about how it's best not to cut tzitzis with metal and that there's a custom to cut tzitzis strings with your teeth. But now, although I keep searching through O.C. Siman 11, I can't seem to find it. Can anyone come up with marei mekomos?

would a ceramic blade knife be also an acceptable alternative to teeth and metal? Ceramic blades are made out of zirconium dioxide (ZrO2)
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@TzitzMan Yes, you can use a ceramic blade, and it is how most companies today cut their tzizit.
@Ben ShmuelBrill gave you the Mare Makom in the Mishna Berura

Shmuel Brin · Answer 1 · 2011-10-27 00:29:21Z

up vote 6 down vote

Look in Mogen Avraham sif katan 18 and Shulchan Aruch Harav (11:24) where it says that one should not cut Tzitzis with metal (like a Mizbeyach (Altar)) but cut them with his teeth.

It's also in the Mishna Brura s"k 61

edited Oct 27 '11 at 0:29

answered Aug 21 '11 at 4:42

Shmuel Brin
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I was also told a flame is OK; I use a candle. Easier and neater than teeth. – yitznewton Oct 27 '11 at 13:57

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Hacham Gabriel · Answer 2 · 2012-04-16 21:41:10Z

up vote 1 down vote

The Yalqut Yosef may write that it is better not, but if one needs to he may. I think the Ben Ish Hai brings the Rashash who writes to refrain from doing so.

edited Apr 16 at 21:41

Hacham Gabriel
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answered Oct 27 '11 at 0:14

Rabbi Gabriel
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