TorahUmadda-731-MelechYavanHarasha: re Rav Elyashiv, Rav Elyahu Zilberman Shlit”a R”Y Aderes Eliyahu told me his Teshuvah was about janthina not murex (as is clear from the fact he refers to 3rd definite opinion for Tcheiles) — Saul Kaplan from Rechovot claims he found a process to dye blue from janthina but refuses to reveal the process.
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