What is Jute Grading? | Grading System of Jute Fiber

Jute Grading:
Jute is a natural vegetable fiber under the category of bast fibers like flax, hemp, kenaf and ramie. Since ancient times, it has been traditionally grown in the eastern part of the Indian subcontinent, which make up of the present day West Bengal of India and plains of Bangladesh. Grading is done after the barky ends are cut off. There are six grades both for White and Tossa jute. The characteristics specified for various grades are given below.


Grading System of Jute Fiber:
Jute fibers are graded according to three qualities of fibers. They are-
On a basis of fiber properties:

I.Length
II.Strength
III.Fineness
IV.Color
V.Lusture
VI.Roots and cleanliness and uniformity in color.

On the basis of color:
There are two colors-  
  1. White and golden
  2. Brown to red Corresponding to the main varieties capsularies and olitorius.
On the basis of export:
  1. A bottom
  2. B bottom
  3. C bottom
  4. X bottom
On the basis of quality of raw jute
  1. Pucca grading
  2. Kutcha grading
Pucca Grading:
Raw jute from which roots have been cut.

White Jute:
Bangla white special (BWS): White or creamy Finest texture Very good luster, clean, well hackled Completely free from any defects of jute Entirely free from red ends

Bangla White-A (BW-A): White to light cream Fine texture Strong and very good luster, clean Completely free from red ends and any blemish

Bangla White-B (BW-B): Light cream to straw color Good texture Strong and good luster, well hackled Free from blemish and red ends excluded .

Bangla White-C (BW-C): Light grey or light reddish to straw color Sound strength Average luster Clean but free from croppy or hard gummy Tops and roots and red soft ends are permissible.

Bangla White-D (BE-D): Any color Average strength Occasional bark and specks permissible Slightly croppy and gummy tops permissible Red ends also permissible.

Bangla White-E(BW-E): Any color Any strength but free from perished fibers Unretted jute.

Tossa Jute:
Bangla Tossa Special (BTS):
  • Uniform golden or reddish color
  • Finest texture
  • Very strong
  • Very good luster
  • Clean cut and well hackled
  • Completely free from any defects.
Bangla Tossa-A(BT-A):

1 .Uniform sliver grey to golden color
  • Fine texture
  • Strong and good luster
  • Clean cut and well hackled
  • Completely free from any blemish.
2.Uniform light golden to reddish color
  • Fine texture
  • Strong and good luster
  • Clean cut and well hackled
  • Completely free from any blemish.
Bangla Tossa-B (BT-B):

1.Light to medium grey color
  • Sound clean
  • Good texture
  • Average luster
  • Clean cut and well hackled
  • Free from any defects
2.Light grey or reddish excluding dark gray color
  • Sound clean
  • Good texture
  • Average luster
  • Clean cut and well hackled
  • Free from any defects
Bangla Tossa-C (BT-C):
  • Mixed colors
  • Average strength
  • Occasional bark and soft specks allowable
  • free from runners
  • Slightly croppy and gummy tops permissible
  • Well cut and hackled but free from black root ends.
Bangla Tossa-D(BT-D):
  • Mixed colors
  • Average strength
  • Occasional bark and specks allowable
  • Free from runners
  • croppy and gummy tops permissible
  • Rough cut and hackled
  • Free from black root ends
Bangla Tossa-E(BT-E):
  • Any color
  • Any strength but free from unretted jute
  • Stick and perished fibers
  • Rough cut and hackled bark and hard Centre permissible
Kutcha Grading:
Raw jute from which roots have not been cut.

Kutcha bales are graded as follows-
  1. Tops
  2. Middle
  3. Bottoms
  4. B-bottoms
  5. C-bottoms
  6. X-bottoms
Tops:
  • Very strong fiber
  • Excellent color and luster
  • Free from all defects
  • Cutting not more than (White 15% Tossa 10%)
Middle:
  • Strong sound fibers
  • Average color and luster
  • Free from all specks runners and harsh crop end (White 25% Tossa 15%)
Bottoms:
  • Sound fibers
  • Medium strength
  • Free from all hard centered jute (White 30% Tossa 20%)
B-bottoms:
  • Sound fiber
  • Medium strength
  • Not suitable for higher grade(White 35% Tossa 25%)
C-bottoms:
  • Medium strength
  • Any color
  • Free from runners and choppiness.
X-bottoms:
  • Weak, harsh jute
  • Free from tagled jute and stick
Habijabi:
  • Tangled jute
  • Free from any dust and cuttings 
 

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