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The Petil Techelet company (I believe) makes three types of colored strings:

  • Raavad- 1 full string of blue
  • Tosafot- 2 full strings of blue
  • Rambam- 1/2 string of blue

Does the Rif or Rosh mention any method of coloring the strings?

The reason I'm asking this question is to be my own Shulhan Aruch and determine which coloring he would recommend.

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I was under the impression that they stopped selling the Tosfot style due to lack of demand and those who want to wear it just buy two sets of Raavad. – Double AA Jan 9 '12 at 6:09
I would just like to point out, that once you have techelet, and you look into the way you tie the knots. The number of blue strings only works for the type of knot you tie. Meaning, if you tie like rambam, using two blue strings is impossible. If you tie like Rav Amran Hagaon, then using 1 full blue string also makes no sense. – avi Jan 9 '12 at 7:07
up vote 4 down vote accepted

הלכות קטנות לרא"ש (מנחות) הלכות ציצית סימן ו

ו תנן בראש התכלת [שם דף לח א] התכלת אינו מעכב את הלבן הלבן אינו מעכב את התכלת. פירש"י אף ע"ג דמצוה לתת ב' חוטי תכלת וב' לבן בציצית אפילו הכי אין זה מעכב את זה ואי עביד ארבעתן תכלת או ארבעתן לבן יצא ולכאורה הוי משמע דאין זה מעכב את זה היינו שאם הטיל ב' חוטין מין אחד יצא כי הא דתפילין של יד אינה מעכבת של ראש ושל ראש אינה מעכבת של יד. ונהגו כפירוש רש"י.

In short, the Rosh holds that there should be 2 strings of blue and 2 strings of white.

I am fairly certain the Rif does not comment.


You may find it interesting to note that Rav Yosef Karo in his Beit Yosef does comment on the issue.

בית יוסף אורח חיים סימן יא

ונראה דלא בעי למיחת לפלוגתא במלתא דלא נפקא לן מידי בהאי זימנא

Roughly translated as: And it seems that we don't need to enter into this disagreement [regarding the number of blue strings] as it is a matter which has no practical purpose at this time.

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Argh! Now the argument just got more complicated! – Hacham Gabriel Jan 9 '12 at 4:04
This leads to another question... – Hacham Gabriel Jan 9 '12 at 4:05
@HachamGabriel I'm ready. More rep points for me! :) – Double AA Jan 9 '12 at 4:11
It won't be as easy as this one. Or as specific. – Hacham Gabriel Jan 9 '12 at 4:14
@HachamGabriel I'm always up for a challenge – Double AA Jan 9 '12 at 4:16

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