Interior egg quality specifications for these standards are based on the apparent condition of the interior contents of the egg as it is twirled before the candling light. Any type or make of candling light may be used that will enable consistently accurate determination of the interior quality of shell eggs. It is desirable to break out an occasional egg and to determine the Haugh unit value of the broken out and candled appearance thereby aiding in correlating candled and broken out appearance. Specifications for measuring the thick albumen condition is based on the use of a specially designed micrometer or slide rule to determine the relationship between the weight of an egg and the height of the thick white. The readings are taken in units ranging from 0 to 100 after the egg has been broken out on a flat glass surface.
Quality is best if sold by the expiration date.
All eggs offered for sale in cases, boxes, or cartons shall contain labeling which indicates refrigeration is required. Public Law 91-597, requires that eggs classed as restricted eggs, dirties, checks, leakers, inedibles, loss and incubator rejects as well as graded eggs, exceeding the tolerances allowed for restricted eggs in United States Grade B standards must be labeled with certain required information. Labeling must be legible and conspicuous. The name and address of the packer must appear on each case or label. Restricted Eggs For Processing Only in an Official USDA Egg Products Plant.