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Sample unit-----

A sample unit that ex

ceeds an upper limit (such as for stem material or various defect classifications) or fails to meet & lower limit (such as

drained weights). Any number of sample

units to be used for

inspection of a lot. The entire contents of

a container, a portion of the contents of a container, or a combination of the contents of two or more containers as specified to be used for

inspection. The numerical value

calculated by dividing the total number of applicable defects in a sample by the total number of sample units in that sample.

Sample average


finished product since all of container, as such, is not a factor of quality for the purpose of these grades. The recommended fill of container for canned spinach is the maximum amount of spinach that can be sealed in a container and processed by heat without impairment of quality. It is recommended that the product and packing medium occupy not less than 90 percent of the water capacity of the container.

RECOMMENDED DRAINED WEIGHTS § 52.1906 Recommended drained

weights. (a) General. The recommended drained weight values in Table I of this subpart are not incorporated in the grades of the finished product, since drained weight, as such, is not a factor of quality for the purpose of these grades.

(b) Method for ascertaining drained weight. (1) The drained weight of canned spinach is determined when the product is at approximately room temperature (68° F.). The contents of the container is emptied upon a dry, previously weighed, U.S. Standard No. 8 circular sieve of proper diameter containing 8 meshes to the inch (0.0937 inch, +3 percent, square openings). With the sieve flat on the tray, the container of spinach is placed open end down in the sieve in an upright position. The container is lifted off the spinach without spreading the spinach out on the sieve. The spinach is allowed to drain for exactly 2 minutes. The weight of the spinach and sieve minus the weight of the dry sieve is the drained weight of the spinach.

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Capacityweight 120

at 68°F, (avoirdupois


Minimum drained weight (avoirdupois


Height (inches)


Container designation (metal, unless otherwise


Container size overall



8Z tall..
No. 1 picnic..
No. 300.
No. 1 tall
No. 303.
No. 303 glass.
No. 212.
No. 212 glass..
No. 10..

21416 21416 3 3146 3346

346 4 476 41416 4518

8. 65 10.90 15. 20 16.60 16.85 17.70 20. 50 29.75 29.50 109.45

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376 4416

496 41416



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(2) A sieve 8 inches in diameter is used for the equivalent of a No. 3 size can (404 x 700) and smaller and a sieve 12 inches in diameter is used for containers larger than the equivalent of a No. 3 size can,

FACTORS OF QUALITY $ 52.1907 Factors of quality.

The grade of a lot of canned spinach is based on requirements for product characteristics with respect to the following quality factors:

(a) Flavor and odor.
(b) Color.
(c) Character.
(d) Stem material.
(e) Damage.

(f) Harmless extraneous material. $ 52.1908 Sample unit size.

(a) Compliance with the factors of flavor and odor, color, and character may be determined on: (1) The contents of an entire container, or (2) a representative subsample from containers yielding more than 10 ounces of drained weight.

(b) Compliance with requirements for harmless extraneous material other than plant material is determined on the contents of an entire container.

(c) Compliance with requirements for the factors of stem material, damage, and extraneous plant material shall be determined on subsamples as specified in Table II of this subpart.

PRODUCT CHARACTERISTICS $ 52.1909 Classification of defects.

(a) General. Scoreable defects in the factors of color, character, extraneous plant material, other extraneous material, and damaged spinach are outlined in Tables III, IV, and V.

(b) Extraneous plant material. Extraneous plant material includes root crowns, root stubs, and seed heads of the spinach plant and harmless grass and weeds of various kinds and texture.

(c) Other extraneous material. Other harmless extraneous material includes grit, sand, silt, or other earthy material.

(d) Damage, Damage includes discoloration or other similar injury on a leal or stem or portion thereof which damage affects, materially affects, or seriously affects the appearance or eating quality of the portion of spinach and/or entire product.

(e) Degrees of defect classes. Defects are classified as to minor, major, or severe. Each “X” mark in Tables III, IV, and V represents “one (1) defect”.


Quality factors


Minor Major Sovero


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Extraneous plant



Color appearance is

Adversely affected to a degree that is noticeable

Adversely affected to a degree that is objectionable. Appearance or eating quality, due to a mushy texture, disinte

gration, ragged cutting, or shredded leaves and shredded

stems or portions thereof, as applicable for the style, is-
Adversely, but not seriously, affected..
Seriously affected.
Root crown:
Any significant portion of the solid area of the plant between

the root and attached leaves... Root stub:

Any portion of the root whether or not leaves are attached... Seed head-Whole Leaf; Cut Leaf Styles:

Longer than ono (1) inch or objectionable regardless of length..... Seed head-Chopped Style: Pieces affecting appearance or eating qualityMore than slightly but not materially.






Grit, sand, silt, or other earthly material:
A trace that no more than slightly affects appearance or eating

Presence materially affects appearnce or eating quality.

Other extraneous


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(85 P.R. 3748, Feb. 26, 1970, as amended at 36 F.R. 8557, May 8, 1971)

rial outlined in this subpart (See $ 52.1912).


TOLERANCES FOR GRADE COMPLIANCE $ 52.1910 Tolerances for stem material.

Stem material is that portion of the spinach plant below the point of attachment to the leaf. Allowances for stem material for the respective grade are shown in Table VI, based on the method for ascertaining the amount of stem mate


Upper Limit (UL) Grade

for the classification

sample unit 0.8. Grade A.

28 percent by weight. U.S. Grade B.

80 percent by weight. sample unit Upper Maximum limit allowed for (UL) deviants

8 52.1911

Tolerances for color, character, damage, harmless extraneous material.


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For container sizes: Less than No. 242 (sample unit size-2 ozs.)

Number of defects
permitted in a

Sample averago value

Grade classification

Defect classification

U.S. Grade A.

Minor (grass and weeds).
Total 3
Minor (grass and weeds).
Total 3


4 22 2 8 10 51

2 6 7 27

3 11 14 59

0.28 1. 50 2.00 15.0 0.5 4.0 6.0 40.0

U.S. Grade B.

3 “Total”—the sum of severe, major, and minor defects including minor grass and weeds.

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3 “Total”—the sum of severe, major, and minor defects including minor grass and weeds.

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3 “Total”—the sum of severe, major, and minor defects including minor grass and weeds.


stem material has been removed from STEM MATERIAL

the entire sample unit.

(b) Drained weight of separated ma$ 52.1912 Method for ascertaining per

terial. (1) Allow the leaf material and centage of stem material.

stem material to drain for 2 minutes (a) Method for separation (1) from the time the separation has been Whole leaf; cut leaf styles. (1) Have completed. available two dry, previously weighed

(2) Weigh separately: (1) The screen U.S. Standard No. 8 circular sieves con- and leaf material, and (i) the screen taining 8-meshes to the inch (0.0937, and stem material. The weight of the +3 percent, square openings), not to ex- screen and leaf material minus the ceed 8 inches in diameter.

weight of the screen is the weight of the (1) Place the sample unit of spinach

leaf material. The weight of the screen in water in a deep grading tray. With and stem material minus the weight of gentle agitation, separate the leaves. Re- the screen is the weight of stem material. move the individual leaves from the

(c) Calculations. The percent of stem water and cut the attached stem off just material is the weight of drained stem below the last point of attachment of material divided by the sum of the leaf material.

weights of drained stem material and (iii) Place the stem material on one

drained leaf material. sieve and the leaf material on another sieve. Remove all detached stems and

Weight of stem material

Percent of pieces of stem and detached leaves and

Weight of stem material +

stem material. pieces of leaves from the water and place

weight of leaf material on their respective screen.

LOT ACCEPTANCE (2) Chopped style. Place the sample unit, approximately one ounce at a time,

$ 52.1913 Lot acceptance for drained

weights. in water in a deep grading tray. Remove the loose stem material and place on a

A lot of canned spinach is considered dry sieve as mentioned under (a) (1) of

as meeting the minimum drained this section. Pour the remaining leaf ma- weights when the following criteria are terial on another sieve. Repeat until the met:

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