Scientific

Foundation Principles in Restoring Dying Process of Antiquity

Foundation Principles in Restoring Dying Process of Antiquity 150 150 rhecht

Date: June 4 Correspondence between MF and IZ MF: Dear Dr. Ziderman, I am excited to have found your site and foundation. First of thank you for being at the forefront of this important Mitzvah for Klal Yisroel. I very much agree with your foundation principals.  As a wearer of murex Tekhelet for many years now it…

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Questions on Tekhelet Decomposition Process

Questions on Tekhelet Decomposition Process 150 150 Israel Ziderman

Date: May 21, 2020 Email correspondence between Dr. Israel Ziderman and Rafi Hecht. You mentioned before that Ptil and co. strip the monobromoindigotin dyestuff into indigotin, which you feel makes it kala ilan. Questions: 1. Does that mean that in Menachot 42b, Shmuel bar R’ Yehuda was wrong in adding Sammemim? If not, what would…

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Is the Snail the Chilazon of the Talmud

Is the Snail the Chilazon of the Talmud 150 150 Israel Ziderman

Date: May 17, 2020 AP: Does Chilazon – the snail fit the description in the Talmud? IZ: 1. Following the late Chief Rabbi Herzog, I have demonstrated that the 4 criteria in the talmud are fulfilled in the banded-dye murex (H.trunculus). Do you have any difficulty with my publications on this? 2. Besides that let…

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Mixing Cuttlefish with Murex

Mixing Cuttlefish with Murex 150 150 Israel Ziderman

Date: May 19 MDR: Why not mix the Radzyner Rebbe’s cuttlefish and the murex to create a dye that satisfies both views? The Radzyner process already mixes it with other things, so why not mix the two together to avoid machloces? These discussions here have dealt largely with hypothetical claims and opinions. However the reality…

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Why the Murex Trunculus Snail Alone Can Be Used for Tekhelet

Why the Murex Trunculus Snail Alone Can Be Used for Tekhelet 150 150 Israel Ziderman

Date: April 20, 2020 Israel Ziderman (IZ): Our source in the Tosefta is quite unambiguous: הביא מן החלזון כשרה שלא מן החלזון פסולה. The definite article ה requires a particular species of snail, and would not include any other snail species. The apparently superfluous law שלא מן החלזון פסולה is unequivocal in rejecting any other…

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