Monday, August 26, 2019

history - Historical evidence that blue snail dye was produced in ancient times


http://en.wikipedia.org/wiki/Tyrian_purple and http://en.wikipedia.org/wiki/Iles_Purpuraires show that blue dye was produced from the murex in ancient times in these locations. But on Ptil Tekhelet's website (tekhelet.com), they seem to admit that there is no clear historical evidence that anything but purple was produced from the murex in ancient times, and that any reference to purple snail dye in ancient writings refers to blue as well because blue is a shade of purple. Is there or is there not historical evidence that blue dye from the murex was produced in ancient times?




No comments:

Post a Comment

digital communications - Understanding the Matched Filter

I have a question about matched filtering. Does the matched filter maximise the SNR at the moment of decision only? As far as I understand, ...