Nourritures

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Food quality is explained on another page.

## Food Storage

Food is only fully preserved when it's both, in a *Deep Freeze*, and in a *Sterile Atmosphere*.

### Spoilage Speed

Each Food has a base decay rate. For foodstuff with a base shelf life of 4 cycles this is -25% freshness/cycle. Each modifier causes a part of this base decay rate which are then added together.

Example:

* Unrefrigerated is x0.7, normal atmosphere is x0.3, for normal food spoilage speed of x1
* Refrigerated is x0.2, polluted atmosphere is x1, for an faster food spoilage speed of x1.2

### Temperature

Cooling Food slows down its spoilage. A Refrigerator cools down its contents to 1 °C. The game looks at the food item and its surrounding atmosphere, and picks whichever is lower to decide whether it is refrigerated. Therefore, food can be refrigerated simply by being stored in a cold place.

* Above 4 °C: *Unrefrigerated*, food spoilage multiplier: x0.7 (-17.5%/cycle from a base -25%/cycle)
* Below 4 °C: *Refrigerated*, food spoilage multiplier: x0.2 (-5%/cycle from a base -25%/cycle)
* Below -18 °C: in *Deep Freeze*, food spoilage multiplier: x0 (only the atmosphere will contribute to spoilage)

The only exception is Sleet Wheat Grain, which is much easier to store without spoilage: its refrigerated temperature is less than or equal to 35 °C, and its deep freeze temperature is less than or equal to 10 °C.

If the Food is inside a Vacuum, the temperature of the food alone determines whether it's considered refrigerated or frozen.

### Atmospheres

Food spoils depending on the atmosphere it is exposed to:

* *Normal Atmosphere*: food spoilage multiplier: x0.3 (-7.5%/cycle from a base -25%/cycle)
* *Polluted Atmosphere*: food spoilage multiplier: x1 (-25%/cycle from a base -25%/cycle)
* *Sterile Atmosphere*: food spoilage multiplier: x0 (only the temperature will contribute to spoilage)

Following atmospheres are considered as sterile and slow down Food spoilage:

* Gas Carbon Dioxide
* Gas Chlorine
* Gas Hydrogen
* Vacuum

Only Polluted Oxygen is considered a polluted atmosphere. Any other Gases, any Liquids or Solids (like on a conveyor rail inside a Tile) are normal atmospheres.

### Spoilage Speed Table

Spoil Speed Multiplier
 Below -18 °C (frozen)
 -18 °C to 4 °C (refrigerated)
 Above 4 °C (unrefrigerated)

Shelf Life Multiplier
 Below -18 °C (frozen)
 -18 °C to 4 °C (refrigerated)
 Above 4 °C (unrefrigerated)

## History

* **EX1-465635**: Foods in vacuum now use exclusively their internal temperature to decide if they are refrigerated or not.

* **EX1-463874**:
	+ Rottable items now have two stages of cooling: refrigerated and deep freeze.
	+ Rottable items aren't fully preserved unless they are both in sterile atmosphere AND deep-frozen, because temperature and atmosphere effects now stack.
		- Temperature and atmosphere effects have been rebalanced to account for this.
		- Refrigerated food now lasts 5x as long instead of 2x.
	+ Food preservation times were incorrectly reported in the Codex, and were missing their refrigeration value.
	+ Rottable foods correctly detect if they're in an active fridge or not.
	+ Refrigerators cool things to 2 °C instead of 4 °C, so that they actually get cold enough to be refrigerated. Note: foods in a powered fridge are always considered refrigerated regardless of temperature.
	+ Foods dropped from a fridge will no longer continue cooling off on the ground.
	+ "Unrefrigerated Food" notification now jumps to that food when clicked. Only partially stale unrefrigerated food in storage will trigger the notification.

zh:食物