Tumat Ochlin - Impurity of Food

Machshirin - How food becomes capable of receiving impurity

Shiurim [threshold quantities] of food, for it to transmit impurity

Issues of impurity of liquids - tumat mashkin

Food inside receptacles

Impurity of corpses of animals - tumat neveilah

The appreciation people have for korbanot (Chibat Kodashim) prepares Kodashim for Impurity as food: Pesachim 20a, 24b

The appreciation people have for korbanot (Chibat Kodashim) does [not] allow a korban to communicate impurity to another item: Pesachim 20a

Determining what constitutes "food" based on normal human behavior: Bechorot 10a; Keritot 21a-b

Animal fat, in poor communities where they don't eat meat/poultry regularly: Bechorot 10a

Fat, whether from korbanot or not, even from an animal corpse or tereifah [mortally wounded] animal, receives impurity of food: Pesachim 23a-b

Soft skins, unless worked for the time it takes to travel 4 Mil, get impurity like flesh does: Pesachim 46a

Wheat and barley found in animal feces: Menachot 69a

Soft, edible palm bark: Eruvin 28b

Unripe dates: Eruvin 28b

Animal hide: Eruvin 28b

An animal's placenta: Eruvin 28b

Considering human flesh to be food: Keritot 21a-b

Camels, rabbits [shafan and arnevet] and pigs, which have one of the two kosher signs: Bechorot 10a

Ravens, which have some kosher signs: Bechorot 10b

A dead animal of a kosher species [נבלת בהמה טהורה]: Bechorot 10a

A dead animal of a non-kosher species [נבלת בהמה טמאה]: Bechorot 10a

A dead bird of a kosher species [נבלת עוף טהור], which is eaten in some places and not in others: Keritot 21a; Bechorot 10a

An animal which underwent a training shechitah: Bechorot 10b

Food which a Jew may not eat, but which one may give to nochrim, such as fruit of a tree's first three years, mixed species grown in a vineyard, an ox executed for murder, eglah arufah, the birds from a metzora's purification, a first-born male donkey and Meat and milk mixtures: Bechorot 9b-10a

This type of impurity is considered 'tumah kalah' - light impurity - because of the relatively low level of impurity it can create and communicate: Keritot 20b

Food becomes impure via contact with something which is impure from contact with liquids, biblically or rabbinically: Pesachim 14a-b, 19b

Food which is inedible to humans: Pesachim 45b

Food which people eat in some places and not others: Keritot 21a-b

Food remains impure until it is destroyed beyond edibility for a dog: Pesachim 15b, 45b; Keritot 21a

A container combines all parts of korbanot, but not of terumah, within it, to become impure once one of them becomes impure: Pesachim 19a

Whether the above rule is rabbinic or biblical: Pesachim 19a

Food in which a needle which is Impure from Death is found, is impure; hands and the slaughtering knife aren't: Pesachim 19a-20a

Food in a vessel with a crawling creature becomes a Second Descendant Level of Impurity: Shabbat 138b, Pesachim 20a-b

Whether the stems of grapes being harvested for wine-making can receive impurity: Succah 13b

Whether the stems of vegetation being cut for the Roof of a Succah can receive impurity: Succah 13b

Stems of produce, which are processed: Succah 14a

Annulling a thought which made produce stems capable of receiving impurity, via another thought: Succah 13b-14a

Entities which are not normally treated as food, but which may be viewed as food since the Torah prohibits their consumption: Bechorot 10a-b

Honey which one did not intend to treat as food: Bechorot 7b

Food making its consumer impure rabbinically or biblically, vis-a-vis applying a lenient/stringent threshold quantity for communication of impurity: Yoma 80b

Ability of food to make other non-sanctified food impure rabbinically or biblically: Pesachim 14a, 18a, 18b-19a

Ability of terumah to make other food impure rabbinically or biblically: Pesachim 14a

Ability of korbanot to make other food impure rabbinically or biblically: Pesachim 14a

Ability of food to make Liquids impure: Pesachim 18b

Ability of food to make Vessels impure: Pesachim 18b, 19b

Status of a person who eats a half-shiur which has a higher level of impurity and then a half-shiur which has a lower level of impurity: Zevachim 31a



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