May one insulate (hatmanah) food on Shabbat itself with a substance that does not add heat?
Synopsis
Insulating food on Shabbat itself is forbidden even with a substance that does not add heat, due to a gezeira that one might find the pot cold and reheat it. However, during bein hashemashot (twilight) it is permitted because pots are still hot at that time.
More in Insulating Food (Hatmanah)
May one insulate food before Shabbat with a substance that adds heat (mosif hevel)?
12 opinions
If food was insulated in a heat-adding substance and it merely retained its warmth (did not heat up or improve), is it permitted b'dieved?
2 opinions
May one place items on top of food on Shabbat to protect it from mice or dust, even if those items retain heat?
3 opinions
Which substances are classified as adding heat (mosif hevel) and which do not?
7 opinions
If hatmanah was done before Shabbat and the pot became uncovered on Shabbat, may one re-cover it or change the insulation?
5 opinions
If food is transferred from its original pot to a different pot on Shabbat, may one insulate it?
4 opinions
May one insulate cold food on Shabbat, and with what types of substances?
3 opinions
Does the prohibition of hatmanah apply even when food is fully cooked and mitzta'mek v'ra lo (shrinks to its detriment)?
6 opinions
Related from other topics
Is it permitted to lend a tool to a non-Jew on Shabbat itself, or close to nightfall on Friday when there is no time for the non-Jew to remove it from the Jew's doorway before Shabbat?
Shabbat Candle Materials
Is it permitted to give a letter to the postal service (beit dvar / Postmeister) on Shabbat itself?
Adjusting the Candle on Shabbat
If one boards a ship on Erev Shabbat and establishes it as his place (kinyan shevita), may he sail on Shabbat itself?
Work Forbidden After Candle Lighting
If food is removed from the tanur on Shabbat, may it be wrapped in pillows and blankets (hatmanah)?
Leaving Food on the Fire (Shehiyah)
May one pour pre-insulated hot water into a pot of drying food on Shabbat?
Leaving Food on the Fire (Shehiyah)
If bread was placed in the oven on Shabbat itself, may one remove it before it bakes?
Returning Food to Fire (Chazarah)
Discussion
Discussion coming soon.
The Daily Law
One question. Every opinion. Every morning.
A new halakhic question and the full spectrum of rabbinic thought, delivered daily.