Cartridge paper grades A and B
GOST 876-73
Grade: (GOST) A and B
Grade А – applies for manufacturing of one-time hunting and sports cartridges, and as a wrapping for other charges.
Grade B – applies for manufacturing of cartridges and wrappings for powder and other charges, wads and other purposes. Also it is used for furniture production, blackboards, table boards, salutes.
Description: Cartridge paper hard, high-strength, anticorrosive. Used for production of cartridge cases, and in everyday life.
Technical specification:
| Parameters | Grade А | Grade B |
|---|---|---|
|
Fiber composition,
% unbleached sulfate wood pulp as per standards |
100
|
|
|
Thickness, µm
|
223 + 10
|
|
|
Allowed Density, g/cm3
|
0,70 – 0,80
|
|
|
Destructive force, N (kgf), minimum
- in machine direction - in transverse direction |
181 (18,5)
108 (11,0) |
|
|
Elongation at fracture, %, minimum
- in machine direction - in transverse direction |
1,8
5,0 |
|
|
Sizing degree, mm, minimum
|
1,2
|
|
|
Air permeability cm2/min, maximum
|
70
|
|
|
Deformation after getting wet in water
within 2 hours in transverse direction, % , maximum |
-
|
|
|
Humidity
|
5 - 8
|
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