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Egg Grading and Quality
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Flashcards
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Air Cell Size
Determines grade; smaller in AA (<1/8 inch), moderate in A (<3/16 inch), large in B (up to 3/8 inch).
Yolk Quality
Quality judged by the distinctness of the outline and absence of defects; should be well-centered in higher grades.
Shell Quality
Should be clean, unbroken, and with normal shape; higher grades have no stains or ridges.
A Grade Egg
High quality, with reasonably firm albumen, clean and unbroken shell, and yolk slightly off-center is acceptable.
Meat and Blood Spots
These are quality defects; should not be present in AA or A grade eggs but are allowed in small amounts in B grade.
Color of Shell
Does not affect the grade; eggs can be white or brown depending on the breed of the hen.
Egg Size or Weight
Does not affect the grade directly but is used for classification: Jumbo, Extra Large, Large, Medium, Small, and Peewee.
AA Grade Egg
Highest quality, with firm and thick albumen, clean and unbroken shell, and centered yolk with small air cell.
Shell Thickness
No standard measurement, but shells must be sufficiently thick to prevent cracks and protect contents.
Haugh Unit
A measure of albumen quality related to freshness; calculated from egg weight and albumen height.
Grading by USDA
United States Department of Agriculture sets the standards and certifies egg grading practices.
Candling Process
Quality check method where light is used to observe internal egg structures and defects such as blood spots and air cell size.
Egg Freshness
Reflected by small air cell, high Haugh unit score, firm albumen, and yolk slightly above center with a round, intact shape.
Refractometer Reading
Used to measure the concentration of dissolved substances in egg albumen, an indication of quality.
Julian Date
The date of packaging expressed as the number of days since the beginning of the calendar year, indicating egg freshness.
Storing Temperature
Eggs should be stored at temperatures below 45°F to maintain quality and safety.
Albumen Quality
Judged by clearness and viscosity; higher grades have clearer and thicker albumen.
B Grade Egg
Moderate quality, with looser albumen, shell may have slight stains, and larger air cell, suitable for processing.
Bloom or Cuticle
Outermost coating of eggshell that helps prevent bacterial entry; should be intact in higher grades.
Odd-Shaped Eggs
Eggs with unusual shapes that do not typically meet AA or A grade standards.
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