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Criteria for
Identification
of
Tekhelet & the
Hillazon
Prepared by Mois A. Navon |
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Talmudic Description |
Physical Evidence |
Environs |
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Tzaydei
hillazon - The fishers of the hillazon are from Haifa to
Tzur (Tyre). (Shabbat 26a). |
· Archeological digs show remnants of the dyeing
industry on the Northern coast of Israel through the southern coast of
Lebanon. (Royal Purple, p.149-157; Sterman, p.64). · Digs near Haifa and Tyre and beyond, revealed
mounds of Murex shells (broken to access their dyestuff) - some up to
one hundred yards long and several yards thick. (Royal Purple, p.24, p.151-5;
Ziderman, p.438; Twerski, p.82). |
Shell |
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Potzeia - One who breaks open a hillazon violates
Shabbat. (Shabbat 75a). Go and
learn [about the clothes of the Jews in the desert] from the hillazon,
all the time that it grows, its shell (nartiko) grows with it (Shir
HaShirim R. 4:11). |
· R. Herzog explains the use of the verb potzea
to mean, “break open” - as in a nut. (Herzog, p.57). · The Murex snail is a hard-shelled Mollusk,
which must be broken open to obtain the dyestuff. (Ziderman, p.430). · The shells
found in the archeological digs were broken in the exact spot necessary to
obtain the dyestuff. (Ziderman, p.438). |
Expense |
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“The hillazon
is this: its body is like the sea, it’s creation is like a fish, it comes up
once in 70 years and with its blood one dyes tekhelet - due to this it
is expensive” (Men. 44a). |
· The
vagueness of these descriptions make them ineffective for use in identification
- other more indicative signs could have been given, if that was the
intention of the Gemara. Each
point comes to explain the conclusion of the statement that “the dye is
expensive” (Rock, n.57). · The declaration that “it is expensive” is simply
out of place in a formal halachic definition. It would, however, make sense as part
of an explanation to consumers curious as to the reason for the exorbitant
price. (Herzog, pp.66-7). |
Creation |
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Briato - Its creation is similar to that of a fish.
(Men. 44b). |
· Briah - a
general classification of creatures - “like fish” that live in the ocean, so
too do Murex snails. (Rock, n.57). · Murex snails are spawned from eggs, just like
fish. (Twerski, p.98). |
Body Color |
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The body
of the hillazon is like the sea. (Men. 44a). |
· The snail shell takes on a blue-green color due
to the sea fouling organisms covering them. In any case, the shell is always the same color as the
seabed in which it is found. (Sterman, p.69). Biblical and Talmudic references to “sea” often refer to
“sea-bed” (e.g. Yishaya 11:9). (Rock, p.15). · It is a more than reasonable assumption that the
Gemara is referring to the shell as it looks when it is caught (and not after
it has been polished). (Ziderman, p.430). |
70 Years |
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…[the hillazon]
comes up once in 70 years (Men. 44a). |
· “Once in 70 years” (an oft-used Talmudic
expression meaning “once in a lifetime”) it washes up; otherwise, it must be
fished out, thus adding to its cost. · “Nevuzaradan left … the tzadei hillazon”
(Shabbat 26.) - for the sake of the king’s garments (Rashi on ibid.). · The Rambam (Hil. Tzitzit 2:2) makes no reference
to “70 years”. |
Dye Extrac- tion |
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One is
more pleased that it should be alive, so that the “blood” should be
clear/successful (Shabbat 75a) - the “blood” from the live [hillazon]
is better than from it dead. (Rashi on ibid.) |
· Inside the hypobranchial gland of the snail, only
the precursors to the dye exist as clear liquid. (Sterman, p.76). · The chemistry of the dye formation in the Murex
requires a specific enzyme (purpurase), which quickly deteriorates upon the
snail’s demise. (Sterman, p.68). |
Dye Color |
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Tekhelet resembles the color of the sea, and the sea the
sky…(Men. 43b). God
said: I have distinguished in Egypt between the drop of [semen that was to
become] a firstborn and that of a non-firstborn, I will exact retribution
from he who attaches kela ilan to his cloth and claims it is tekhelet
(Baba Metzia 61b). |
· Kela Ilan
has consistently been identified as indigo (Aruch), which is blue. · The blue dye obtained from the Murex trunculus
snail is molecularly equivalent to the dye obtained from the kela
ilan plant. (Royal Purple, p.175; Sterman, p.66). |
Dye Additives |
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How
is Tekhelet made? By placing the blood of the hillazon and samanim
(chemicals) in a pot to boil (Men. 42b) - samanim are only to fix the
dye into the fabric (Noda BeYehuda). |
The
process of making dye from Murex trunculus: · The dyestuff is boiled along with a strong base to dissolve the snail
meat and to create the chemical environment for reduction. ·
A reducing agent is added to make the dye
water-soluble enabling it to take to wool (typical of vat dyeing). An acid is then added to neutralize
the strong basic solution in order to prevent the dye solution from damaging
the wool. |
Dye
Testing
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How
is Tekhelet made? … then we take out a little in an egg shell and test
it on a piece of wool (Men. 42b). |
As
with all vat dying, the Murex dye solution is yellowish in the vat and
its final color can only be determined when the dye oxidizes in the
wool. Since the resultant color can range from blue to purple, the dye must be tested to determine if
it has been sufficiently exposed to ultraviolet light. |
Dye
Quality
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Lo ifrad
hazutei - If its color is permanent
then its valid (Men. 43a) - its dyeing is well known for its steadfast beauty
and does not change (Rambam, Hil Tzitzit 2:1). |
· The Murex dye binds very tightly to wool,
and is among the fastest of dyes known to the ancient world. (Sterman, p.67).
· Three days in strong bleach has no effect.
(Twerski, p.91). |
Manner- ism |
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“Treasures
buried in the sands”(Dev. 33:19) refers to the hillazon. (Megilla 6a). |
Murex
trunculus burrows into the sands and
sediment on the sea floor. (Royal Purple, p.181, p.190; Ziderman, p.429;
Twerski, p.85). |
Name |
porfura |
Raavya
quotes the Yerushalmi identifying tekhelet with the Greek word
porphyra. |
Porphyra
is the Greek word used to refer to Murex snails. (Sterman, p.68). |
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Sources: R. Isaac
Herzog, The Royal Purple and The Biblical Blue, Keter, 1987. Dr.
Baruch Sterman, The Science of Tekhelet, Tekhelet: Renaissance
of a Mitzvah, YU Press, 1996. Dr.
Yisrael Ziderman, Reinstitution of the Mitzvah of Tekhelet in Tzitzit,
Techumin, Vol. 9. R. Chaim
Twerski, Identifying the Chilazon, Journal of Halacha and Contemporary
Society, Num. XXXIV. |
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www.tekhelet.com
mois@tekhelet.com |