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TYPE

THICKNESS
mm

DENSITY
gm/ccm3

TENSILE
STRENGTH
kN/mm2

SPLITING
RESISTANCE
N

LENGTH
m

WIDTH
cm

Extra Hard

---

0.34

0.4

12.5

As declared
or marked

132 or
as agreed
with a
+/- 2%

Hard

As agreed
(See Note No.1)

0.24

1.4

9.0

Medium Hard

0.18

0.9

See Note 4

Soft

---

0.15

See Note 3

See Note 4

Method of Test

B-2

B-3

B-4

B-5

IS : 1954-1969*

Note 1	The common thickness of felts are 1.5, 3, 6,10,13,16,19,22 & 25 mm
Note 2	The usual piece lengths of felt are 4 and 14 mtrs
Note 3	The tensile strenght shall not be determined in case of soft felt.
Note 4	The tensile strenght shall not be determined in case of medium hard and soft felts and also in case of felt having thickness of 6 mm and below.

* Method for determination of length and width of fabrics (first revision)

The tolerance of thickness and density of felt shall be as foll
Felt having a on Thickness of	Tolerance Thickness
6 mm and below	+/- 20 perce
7mm to 13 mm	+/- 15 perce
Above 13 mm	+/- 10 perce