Grades of Wool
- Finer than grade 80's. Wool with an average fiber diameter of 17.69 microns or less and a standard deviation in fiber diameter of 3.59 microns or less.
- Grade 80's. Wool with an average fiber diameter of 17.70 to 19.14 microns, inclusive, and a standard deviation in fiber diameter of 4.09 microns or less.
- Grade 70's. Wool with an average fiber diameter of 19.15 to 20.59 microns, inclusive, and a standard deviation in fiber diameter of 4.59 microns or less.
- Grade 64's. Wool with an average fiber diameter of 20.60 to 22.04 microns, inclusive, and a standard deviation in fiber diameter of 5.19 microns or less.
- Grade 62's. Wool with an average fiber diameter of 22.05 to 23.49 microns, inclusive, and a standard deviation in fiber diameter of 5.89 microns or less.
- Grade 60's. Wool with an average fiber diameter of 23.50 to 24.94 microns, inclusive, and a standard deviation in fiber diameter of 6.49 microns or less.
- Grade 58's. Wool with an average fiber diameter of 24.95 to 26.39 microns, inclusive, and a standard deviation in fiber diameter of 7.09 microns or less.
- Grade 56's. Wool with an average fiber diameter of 26.40 to 27.84 microns, inclusive, and a standard deviation in fiber diameter of 7.59 microns or less.
- Grade 54's. Wool with an average fiber diameter of 27.85 to 29.29 microns, inclusive, and a standard deviation in fiber diameter of 8.19 microns or less.
- Grade 50's. Wool with an average fiber diameter of 29.30 to 30.99 microns, inclusive, and a standard deviation in fiber diameter of 8.69 microns or less.
- Grade 48's. Wool with an average fiber diameter of 31.00 to 32.69 microns, inclusive, and a standard deviation in fiber diameter of 9.09 microns or less.
- Grade 46's. Wool with an average fiber diameter of 32.70 to 34.39 microns, inclusive, and a standard deviation in fiber diameter of 9.59 microns or less.
- Grade 44's. Wool with an average fiber diameter of 34.40 to 36.19 microns, inclusive, and a standard deviation in fiber diameter of 10.09 microns or less.
- Grade 40's. Wool with an average fiber diameter of 36.20 to 38.09 microns, inclusive, and a standard deviation in fiber diameter of 10.69 microns or less.
- Grade 36's. Wool with an average fiber diameter of 38.10 to 40.20 microns, inclusive, and a standard deviation in fiber diameter of 11.19 microns or less.
- Coarser than grade 36's. Wool with an average fiber diameter of 40.21 microns or more.
Grades of Wool Top
- Finer than grade 80's. Wool top with an average fiber diameter of 18.09 microns or less and a fiber diameter dispersion that meets the following requirements:
a. 25 microns and under-not less than 95 percent.
b. 25.1 microns and over-not more than 5 percent.
c. 30.1 microns and over-not more than 1 percent.
- Grade 80's. Wool top with an average fiber diameter of 18.10 to 19.59 microns, inclusive, and a fiber diameter dispersion that meets the following requirements:
a. 25 microns and under-not less than 91 percent.
b. 25.1 microns and over-not more than 9 percent.
c. 30.1 microns and over-not more than 1 percent.
- Grade 70's. Wool top with an average fiber diameter of 19.60 to 21.09 microns, inclusive, and a fiber diameter dispersion that meets the following requirements:
a. 25 microns and under-not less than 83 percent.
b. 25.1 microns and over-not more than 17 percent.
c. 30.1 microns and over-not more than 3 percent.
- Grade 64's. Wool top with an average fiber diameter of 21.10 to 22.59 microns, inclusive, and a fiber diameter dispersion that meets the following requirements:
a. 30 microns and under-not less than 92 percent.
b. 30.1 microns and over-not more than 8 percent.
c. 40.1 microns and over-not more than 1 percent.
- Grade 62's. Wool top with an average fiber diameter of 22.60 to 24.09 microns, inclusive, and a fiber diameter dispersion that meets the following requirements:
a. 30 microns and under-not less than 86 percent.
b. 30.1 microns and over-not more than 14 percent.
c. 40.1 microns and over-not more than 1.50 percent.
- Grade 60's. Wool top with an average fiber diameter of 24.10 to 25.59 microns, inclusive, and a fiber diameter dispersion that meets the following requirements:
a. 30 microns and under-not less than 80 percent.
b. 30.1 microns and over-not more than 20 percent.
c. 40.1 microns and over-not more than 2 percent.
- Grade 58's Wool top with an average fiber diameter of 25.60 to 27.09 microns, inclusive, and a fiber diameter dispersion that meets the following requirements:
a. 30 microns and under-not less than 72 percent.
b. 30.1 microns and over-not more than 28 percent.
c. 50.1 microns and over-not more than 1 percent.
- Grade 56's Wool top with an average fiber diameter of 27.10 to 28.59 microns, inclusive, and a fiber diameter dispersion that meets the following requirements:
a. 30 microns and under-not less than 62 percent.
b. 0.1 microns and over-not more than 38 percent.
c. 0.1 microns and over-not more than 1 percent.
- Grade 54's. Wool top with an average fiber diameter of 28.60 to 30.09 microns, inclusive, and a fiber diameter dispersion that meets the following requirements:
a. 30 microns and under-not less than 54 percent.
b. 30.1 microns and over-not more than 46 percent.
c. 50.1 microns and over-not more than 2 percent.
- Grade 50's. Wool top with an average fiber diameter of 30.10 to 31.79 microns, inclusive, and a fiber diameter dispersion that meets the following requirements:
a. 30 microns and under-not less than 44 percent.
b. 30.1 microns and over-not more than 56 percent.
c. 50.1 microns and over-not more than 2 percent.
- Grade 48's. Wool top with an average fiber diameter of 31.80 to 33.49 microns, inclusive, and a fiber diameter dispersion that meets the following requirements:
a. 40 microns and under-not less than 75 percent.
b. 40.1 microns and over-not more than 25 percent.
c. 60.1 microns and over-not more than 1 percent.
- Grade 46's. Wool top with an average fiber diameter of 33.50 to 35.19 microns, inclusive, and a fiber diameter dispersion that meets the following requirements:
a. 40 microns and under-not less than 68 percent.
b. 40.1 microns and over-not more than 32 percent.
c. 60.1 microns and over-not more than 1 percent.
- Grade 44's. Wool top with an average fiber diameter of 35.20 to 37.09 microns, inclusive, and a fiber diameter dispersion that meets the following requirements:
a. 40 microns and under-not less than 62 percent.
b. 40.1 microns and over-not more than 38 percent.
c. 60.1 microns and over-not more than 2 percent.
- Grade 40's. Wool top with an average fiber diameter of 37.10 to 38.99 microns, inclusive, and a fiber diameter dispersion that meets the following requirements:
a. 40 microns and under-not less than 54 percent.
b. 40.1 microns and over-not more than 46 percent.
c. 60.1 microns and over-not more than 3 percent.
- Grade 36's. Wool top with an average fiber diameter of 39.00 to 41.29 microns, inclusive, and a fiber diameter dispersion that meets the following requirements:
a. 40 microns and under-not less than 44 percent.
b. 40.1 microns and over-not more than 56 percent.
c. 60.1 microns and over-not more than 4 percent.
- Coarser that grade 36's. Wool top with an average fiber diameter of 41.30 microns or over.
Detailed standards, Inspection Instructions & Other Resources: