Grades, Grade Requirements, and Grade Designations------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Maximum limits of--
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Seeds, heat damaged, Chalky kernels \1 2\ Broken kernels Other types \4\
and paddy kernels Red rice ----------------------------------------------------------------------------------------
(singly or combined) and
Grade ------------------------- damaged In medium Color Minimum milling
Heat damaged kernels In long or short Removed Removed Through a Whole Whole and requirements \1\ requirements \5\
Total kernels and (singly grain grain Total by a 5 by a 6 6 sieve kernels broken
(number objectionable or rice rice (percent) plate \3\ plate \3\ \3\ (percent) kernels
in 500 seeds (number combined) (percent) (percent) (percent) (percent) (percent) (percent)
grams) in 500 grams) (percent)------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------U.S. No. 1...................... 2 1 0.5 1.0 2.0 4.0 0.04 0.1 0.1 ......... 1.0 White or creamy. Well Milled.U.S. No. 2...................... 4 2 1.5 2.0 4.0 7.0 0.06 0.2 0.2 ......... 2.0 Slightly gray... Well Milled.U.S. No. 3...................... 7 5 2.5 4.0 6.0 15.0 0.1 0.8 0.5 ......... 3.0 Light gray...... Reasonably well
milled.U.S. No. 4...................... 20 15 4.0 6.0 8.0 25.0 0.4 1.0 0.7 ......... 5.0 Gray or slightly Reasonably well
rosy. milled.U.S. No. 5...................... 30 25 \5\ 6.0 10.0 10.0 35.0 0.7 3.0 1.0 10.0 ......... Dark gray or Reasonably well
rosy. milled.U.S. No. 6...................... 75 75 \6\ 15.0 15.0 15.0 50.0 1.0 4.0 2.0 10.0 ......... Dark gray or Reasonably well
rosy. milled.U.S. Sample grade:
U.S. Sample grade shall be milled rice of any of these classes which: (a) Does not meet the requirements for any of the grades from U.S. No. 1 to U.S. No. 6, inclusive; (b) contains more
than 15.0 percent of moisture; (c) is musty or sour, or heating; (d) has any commercially objectionable foreign odor; (e) contains more than 0.1 percent of foreign material; (f) Contains
two or more live or dead weevils or other insects, insect webbing, or insect refuse; (g) is otherwise of distinctly low quality.------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------\1\ For the special grade Parboiled milled rice, see Sec. 868.315(c).\2\ For the special grade Glutinous milled rice, see Sec. 868.315(e).\3\ Plates should be used for southern production rice; and sieves should be used for western production rice, but any device or method which gives equivalent results may be used.\4\ These limits do not apply to the class Mixed Milled Rice.\5\ For the special grade Undermilled milled rice, see Sec. 868.315(d).\6\ Grade U.S. No. 6 shall contain not more than 6.0 percent of damaged kernels. [67 FR 61250, Sept. 30, 2002, as amended at 70 FR 37255, June 29, 2005]