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raisins

United States standards

1. Seedless Raisins

Sizes of seedless rasins and golden seedless raisins

Size Definition
Select No more than 60% by weight of all the raisins pass through round perforations 22/64 inch in diameter (8.7 millimeters), but not more than 10% by weight pass through 20/64 inch perforations.
Small or Midget 95% by weight of all the raisins pass through round perforations 9.5 millimeters in diameter (24/64 inch) and not less than 70% by weight of all the raisins will pass through round perforations 22/64 inch in diameter.
Mixed Mixture that doesn't meet eiither the Select or "Small or Midget" size requirements.

For all grades, the raisns in a lot mst have similar varietal characteristics.

Grades of natural seedless, including sun-dried, tunnel-dried, and golden Thomson Seedless

  U. S. Grade¹
A B C
color "good typical" "reasonably good typical" "fairly good typical"
flavor "good characteristic" "good characteristic" "fairly good"
maturity well-matured reasonably well-matured fairly well-matured
maturity (percent by weight "well-matured or reasonably well-matured") not less than 80% not less than 70% not less than 55%
Maximum moisture,² by weight 18% 18% 18%
maximum number of pieces of stem per 6 pounds 1 2 4
maximum number of capstems per pound 15 25 35
maximum sugar, percent by weight 5% 10% 15%
       
       
Max % underdeveloped/substandard if Midget 2% 3% 5%
Max % underdeveloped/substandard if Select 1% 1.5% 2%
Max % underdeveloped/substandard if Mixed 1% 2% 3%
       
     but max % damaged      
     but max % mold damaged      
Max % sugared 5% 10% 15%
Grit, sand, silt none that affects appearance or edibility not more than a trace

1. Another grade, Substandard, applies to seedless raisins that fail to meet the requirements of U. S. Grade C.

2. Except for the Monukka variety, for which the maximum moisture content for all grades is 19% by weight.

 

2. Golden seedless raisins

The size and grade standards are the same as those for seedless raisins, except for the color requirements:

      predominating color percent by weight of definitely dark berries
Grade A,
well-colored
practically uniform yellow or golden to
light amber
yellow or golden not more than ½ of 1 percent
Grade B,
reasonably well-colored
reasonably uniform yellow or golden or greenish yellow
 to light amber
greenish yellow or light amber not more than 3%
Grade C,
fairly well-colored
fairly uniform yellow or greenish yellow to
amber or light greenish amber
  not more than 6%
colored variable     not more than 20%

3 Raisin with seeds except layer or cluster

 

Seeded
  through 34/64 inch round perforations through 22/64 inch round perforations
select not more than 70% by weight not more than 5% by weight
small or midget all not less than 90%
mixed    
     
Unseeded
Size passes through round perforation, diameter in inches
42/64 34/64 24/64
4 crown none none none
3 crown all none none
2 crown all all none
1 crown all all all
Grades of Muscats (seeded)
  U. S. Grade¹
A B C
Maximum moisture 18% 18% 18%
Maximum number of pieces of stem per 2 pounds 1 2 3
Maximum number of seeds per pound 12 15 20
Maximum number of capstems per pound 10 15 20
Max % underdeveloped/substandard 2% 5% 8%
       
     but max % damaged      
     but max % mold damaged      
Max % sugared 5% 10% 15%
Grit, sand, silt none none trace
Minimum % well-matured 80% 70%  

1. Another grade, Substandard, applies to seedless raisins that fail to meet the requirements of U. S. Grade C.

 

Grades of Zante Currents
  U. S. Grade¹
A B
Maximum moisture 20% 20%
Maximum number of pieces of stem 1 in 1.5 lbs 1 in 1 lb.
Maximum number of seeds per pound 12 15
Max % by weight of currents with capstems
 (include a current for each loose capstem)
1.5% 2%
Minimum % well-matured or reasonably well-matured 75%  
Max % underdeveloped/substandard 2% 5%
Max % discolored, damaged or moldy raisins 5% 7%
     but max % damaged 2% 3%
     but max % moldy 3% 4%
Max % sugared 5% 10%
Grit, sand, silt none none
Max % Substandard development and Undeveloped 2% 5%

1. Another grade, Substandard, applies to Zante currents that fail to meet the requirements of U.S. Grade B.

sources

The Zante currant is really the dried fruit of the small black Corinth grape, which is grown in Greece, and especially on Zante, Cephalonia, Ithaca and adjacent islands. The word "currant" is a corruption of Corinth, at one time a prosperous city from which the fruit was exported. The grapes are dried in the sun, picked from the stalks, cleaned and packed for shipment.

E. H. S. Bailey.
The Source, Chemistry and Use of Food Products.
Philadelphia: P. Blakiston's Son & Co., 1916 (corrected edition).

sources

United States Dept. of Agriculture. Agricultural Marketing Service.
United States Standards for Grades of Processed Raisins. Effective date December 1, 1978.

www.ams.usda.gov/standards/raisin.pdf

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