GRADING OF EGGS
1.Grade Canada A: An egg may be graded Canada A if it is observed that:
(1) candling shows:
(a) a reasonably firm albumen;
(b) the blurred contour of the yolk;
(c) a round yolk placed reasonably close to the centre;
(d) an air space not exceeding 5 mm in depth;
(2) the shell:
(a) does not have more than 3 spots, their total surface does not exceed 25 mm2, and it is in all other respects free of dirt and spots;
(b) is of normal shape or almost normal, but may have slight bumps and wrinkles;
(c) is not cracked.
Notwithstanding the first paragraph, where an inspector carries out before grading the inspection of a sample of eggs from a lot:
(1) the quality of the albumen of the eggs from the sample must score an average value of not less than 67 Haugh units;
(2) the sample must contain not more than:
(a) 10% of the eggs having a cracked shell;
(b) 5% of the eggs having a dirty shell, in cases where the dirty area is greater than 160 mm2 but less than one-third of the area of the shell;
(c) 2.5% of the eggs having a dirty shell, in cases where the dirty area is equal to or greater than 1/3 of the area of the shell;
(d) 5% of the eggs having a stained shell, in cases where the stained area is greater than half the area of the shell;
(e) 10% of the eggs having a bumpy, wrinkled or misshapen shell;
(f) 5% of the eggs having an air space exceeding 5 mm in depth;
(g) 2.5% of the eggs that leak.
The total of the various percentages mentioned in subparagraphs a to g of subparagraph 2 of the second paragraph may not exceed 15% of the eggs in the sample.
2.Grade Canada B An egg may be graded Canda B if the egg:
(1) weighs not less than 49 g;
(2) does not meet the standards of Canada A;
(3) is not cracked;
(4) shows, on candling, a clearly outlined yolk;
(5) shows, on candling, a freely floating, slightly oblong yolk when the egg is rotated;
(6) shows, on candling, a yolk whose embryo is only slightly developed;
(7) shows, on candling, an air space not exceeding 9 mm in depth;
(8) has dirty areas on the shell not exceeding 40 mm2, and coloured stains having a total area of not more than 320 mm2,
(9) has a slightly abnormally shaped shell showing clearly bumps and wrinkles.
3.Grade Canada C: An egg may be graded Canada C if it:
(1) is free from dirty areas;
(2) shows a yolk with pronounced contours on candling;
(3) shows a clearly oblong yolk on candling, that does not adhere to the membrane of the shell;
(4) shows on candling meat spots or blood clots not exceeding 3 mm in diameter;
(5) has a shell with coloured spots having a total surface not exceeding one-third of the surface of the shell;
(6) has a cracked shell which does not let the contents leak.