headspace

Thân thiện

The jar has enough headspace to prevent the lid from touching the pickles.

Definition

Noun: 1. The volume left at the top of a filled container (bottle, jar, or tin) before sealing: This is the empty space between the surface of the contents and the lid or closure of a container. It is a critical factor in packaging, especially for food, beverages, and chemicals, to allow for expansion, prevent spillage, or create a vacuum seal.

Usage Examples

• Noun:
  • Proper headspace is essential when canning vegetables to ensure a safe vacuum seal.
  • The recipe specifies leaving half an inch of headspace in the jar before processing.
  • Too little headspace in the fermentation vessel can cause the liquid to overflow.

Advanced Usage

• "To leave headspace": To intentionally create or allow for this empty volume.
  • Always leave adequate headspace when bottling homemade beer.
• "Headspace is critical/crucial/important for...": Used to emphasize the necessity of this space for a specific purpose (safety, quality, process).
  • Headspace is critical for pressure management during the thermal processing of canned goods.

Variants and Related Words

• Headspace Analysis (n): An analytical chemistry technique where the gas (the "headspace") above a sample in a sealed vial is analyzed to determine the volatile components of the sample.
  • Headspace analysis is commonly used in food science and environmental testing.

Synonyms

• Airspace: The unfilled space above the contents in a container. (Note: "Headspace" is more specific to industrial, scientific, or preservation contexts, while "airspace" is more general.)
• Ullage: A formal term, often used in the wine and spirits industry, for the empty space between the liquid and the top of a bottle or cask.

Related Phrases

• Fill level: The height or volume to which a container is filled, directly related to the resulting headspace.
• Vacuum seal: A common result of correct headspace management in canning, where air is removed from the headspace to preserve the contents.

Học thuật

Noun

1. the volume left at the top of a filled container (bottle or jar or tin) before sealing