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First of all, it isn't at all a definite fact that the murex trunculus is the correct fish for dying techeiles, or that the evidence is 'compelling' to everyone. There really is a good answer to this question, both in terms of archaeological evidence and halakhic literature regarding the identity of the chilazon. You ask, "let's say that Murex is not the ...


5

I don't know if they address this concern particularly in terms of the expense. However, the knowledge that murex indigo is chemically identical to plant-based indigo is something knowable only in the 20th and 21st century, when we know about atoms, molecules, and chemicals. If plant-based indigo failed the gemara's test for fastness, and this was just a ...


5

From http://tekhelet.com/tekhelet/ask-ptil-tekhelet/ Q. Who is the mashgiach on the process making sure it's lishma, etc.? Who gives the official hechsher? A. R. Eliyahu Tavger is the Rav of the Amuta. The workers doing the dyeing, spinning, twining of the threads are all yirei shamayim Jews who are very careful to state explicitly before every ...


2

Rav Hershel Schachter in this shuir at 29:30 says that some are afraid to wear techelis because of mechzei kyuhara,but he explains that is only talking about a middas chassidus not trying to fulfill a positive commandment. Whether one agrees with the idea of wearing techeiles or not if one wants to wear it the idea of mechzei kyuhara should not apply. The ...


2

This requirement is stated in the Tosefta and Meseches Tzitzith Tosefta Menachoth 9:16 "תכלת אין כשרה אלא מן החלזון הביא שלא מן החלזון פסולה." Tekheleth is only valid from the חלזון ; if one used a dye not made from the חלזון it is invalid.” מסכת ציצית פרק א הלכה י שאין צובעין תכלת אלא בחלזון. We only dye תכלת with a חלזון from: ...


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According to הרב מאיר הלוי הלמן - לבוש הארון (modern English sefer on Techeiles), on page 21: The color of murex dye was commonly known as “Tyrian Purple”, as the city of Tyre (today in Lebanon) was the leading center for purple dye production. Murex dye had “great brilliance and fastness in comparison with other known dye”. These qualities, as ...


1

A host of information about this topic can be found by browsing more of the Psil Tekhelet website, tekhelet.com. A presentation of a blue murex-dyed textile can be found here. There is much more information to be seen, and it cannot all be written in this forum. As far as I know, no actual tzitzis with blue threads of any kind have been discovered. However, ...



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