Internal defects.

§ 51.1565 Internal defects. Internal defects are defects which cannot be detected without cutting the potato. Some internal defects are listed in Table VII. Table VII—Internal Defects Defects Damage Maximum Allowed Serious Damage Maximum Allowed Occurring outside of or not entirely confined to the vascular ring Ingrown Sprouts, Internal Discoloration, Vascular Browning, Fusarium Wilt, Net Necrosis, Other Necrosis, Stem End Browning 5 percent waste 10 percent waste. Internal Black Spot When the spot(s) are darker than the official color chip (POT-CC-2) after removing 5 percent of the total weight of the potato When the spot(s) are darker than the official color chip (POT-CC-2) after removing 10 percent of the total weight of the potato. Occurring entirely within the vascular ring Hollow Heart or Hollow Heart with Discoloration Area affected not to exceed that of a circle 1/2 inch in diameter in a potato 2 1/2 -inches in diameter or 6 ounces in weight.  1 Area affected not to exceed that of a circle 3/4 inch in diameter in a potato 2 1/2 -inches in diameter or 6 ounces in weight. 1 Light Brown Discoloration (Brown Center) Area affected not to exceed that of a circle 1/2 inch in diameter in a potato 2 1/2 inches in diameter or 6 ounces in weight. 1 Area affected not to exceed that of a circle 3/4 inch in diameter in a potato 2 1/2 inches in diameter or 6 ounces in weight. 1 Occurring entirely within the vascular ring Internal Brown Spot and Similar Discoloration (Heat Necrosis) Not more than the equivalent of 3 scattered spots 1/8 inch in diameter in a potato 2 1/2 -inches in diameter or 6 ounces in weight. 1 Not more than the equivalent of 6 scattered spots 1/8 inch in diameter in a potato 2 1/2 -inches in diameter or 6 ounces in weight. 1 1 Note: Correspondingly lesser or greater areas in smaller or larger potatoes. [35 FR 18258, Dec. 1, 1970. Redesignated at 42 FR 32514, June 27, 1977, and further redesignated at 46 FR 63203, Dec. 31, 1981; amended at 56 FR 7553, Feb. 25, 1991; 56 FR 10302, Mar. 11, 1991; 73 FR 15058, Mar. 21, 2008 ; 73 FR 70586, Nov. 21, 2008; 76 FR 31789, June 2, 2011] Metric Conversion Table