Property Bleached Cotton Linters Purified & Unbleached Cotton Linters Grade-V
Grade I
Grade II
Grade III
Grade IV
1. Alpha cellulose content % by mass 98.5%
Min.
98.5%
Min.
98.0%
Min.
98.5%
Min.
98.5%
Min.
2.Moisture content % by mass 7% 7% 7% 7% 7%
3. Ash content mineral matter content % by mass 0.12%
Max.
0.25%
Max.
0.25%
Max.
0.30%
Max.
0.5%
Max.
4.Degree of polymerisation(DP) 900-1300 900-1900
900-1300
2500
Min.
2665
Min.
5.Viscosity in cps in 0.5% Cuprammonium solution by Shirley Institute Test Method. 5.7 to 11cps 5.7 to 22.2cps 5.7 to 11cps 40 cps
Min.
50 cps
Min.
6.Acidity/Alkalinity Nil Nil Nil Nil Nil
7. Iron Content ppm 15 ppm
Max.
30 ppm
Max.
30 ppm
Max.
30 ppm Max. 40 ppm
Max.
8. Matter soluble in 3 % boiling alkali (3% soda solubility) 2.5%
Max.
3.0 %
Max.
2.5 %
Max.
3.5 %
Max.
3.5 %
Max.
9. Ether soluble matter (% by mass) 0.25%
Max.
0.30%
Max.
0.50%
Max.
0.50%
Max.
0.50%
Max.
10.Hydrophility(in secs) 2 Sec
Max.
2 Sec
Max.
3 Sec
Max.
3 Sec
Max.
5 Sec
Max.
11. Sulphuric Luminosity 400+/-50 - - - -
12. Iso Brightness 79
Min.
- 75
Min.
60
Min.
-
*Note : cps - Centipoise Min-Minimum Max. - Maximum