[Avodah] Just How hot is Yad Soledes Bo anyway?

[rabbirichwolpoe at gmail.com]

Re:  Rn Chana's post

FWIW My chemist chavrusa now has semicha

We weren't measuring YSB directly. We were measuring what is the
threshold temperature that cooking-bishul takes place. So I see
retropsectively that I mis-titled the subject line. Sorry for any
confusion!

Should have said "at what temp can Bishul take place" [sans salt or
vinegar etc.]



Under the proper conditions - and given sufficient time - 40 Celsius
will cook

Note that since the 4th dimension here is time, it will NEVER cook
significanly in a kli sheini that is only 40C! [Maybe at most kdei'
klippah.] The only pragmatic way to get 40C to cook is on a renewable
source of heat.

Point? A simmering pot at 40C is cooking and would need to be kashered
via hag'alah with minimally the same circumstances [kvol'o kach polto
as per SA]
NB RAF has some sheetos in Roshonim that are achmir



Issues of bishul for shabbos are mostly a different genre here because
we are primarily discussing hag'ala and perhaps bishul bassar bechalav
in this thread. [See below re: bishul achar bishul]

EG if 40C CAN cook, on Shabbos you would have an issur d'orraiso
immediately even if it was not a shiur - because of hatzi shiur asra torah


Re: the damage be'diavad of milk simmer @ 40C for a short time - the
damage may be negligible, and so its hag'alah to restore it to being
parve may also be correspondingly negligible.

And re: Shabbos, too, ein bishul achar bishul must mean it has reached
a threshold of bishur [EG maachal ben drosai] but more probably mevushal
kol tzorko

KT
RRW.
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