this test have been my me & my friends at IICT, Bhadohi in which test of flammability test of different types of pure silk like Mulberry silk, Eric Silk, & vanya silk.

1. CARPET FLAMMABILITY TEST
PRESENTED BY –
INDIAN INSTITUTE OF CARPET TECHNOLOGY
BHADOHI
British Standard (BS) 4790-1987effectsofa small source ofignition on
Floorcoverings carpet.

2.  Scope:
• The British Standard describes a method for the determination of the effects of a small
source of ignition on textile floor covering using a hot metal nut method.
• It is applicable to all types of textile floor coverings whether loose-laid or fully adhered
and used with or without an underlay.
Principle
• A stainless steel nut heated at 900° C is placed on the use surface of the test material
and the greatest radius of the effects of ignition from the point of application of the nut
is measured on both use-surface and under surface.
• 35 mm or less can be described as ‘low radius effects of ignition’ and indicates that the
material is ignited from a small source.
• 35 mm and up to 75 mm –’medium radius of ignition’ and indicates will spread flame
to a limited extent only.
• >75 mm –’ high radius of effects of ignition’ indicates the material will ignite and may
continue to spread.
Apparatus Used
 Test Chamber

3.  Muffle Furnace
 Hexagonal nut
• Clamping ring
 Tong

4. • Circular scale
 Transparent grid,
 Stop watch
Procedures of testing
• First of all taken three sample whose size is 300 mm x 300 mm, including any backing.
• Place the test specimen on the floor of the chamber in loose-laid condition.
• After that placing the Hexagonal nut by the help of clapping ring on top of the specimen
press down firmly for 30 Sec.
• Finally calculate the radius of ignition by the help of circular scale.
Sample specification
• Cut the carpet sample by the cutting template.
• Sample size of the carpet is 300mm × 300 mm.
• Three sample is tested.
• Standard atmosphere
RH – 65±2% & Temp. – 20±2°C
• Conditioning time – 24 hour

5. OBSERVATION TABLE:
Mulberry Red
Eric Golden
Vanya Black

6. Turkish Mulberry Red (T.M.R)
Sl. No. Parameters Test 1. Test 2. Test 3. Requirement(mm)
1 Radius of the
affected area on
use surface side
(mm)
23 24 23
2 Radius of the
affected area on
under surface
side (mm)
Nil Nil Nil
3 Greatest Radius
of the affected
area (mm)
24≤ 75
4 Rime of Ignition
of reach the
clamping ring
(Sec.)
Nil Nil Nil
5 Flame Extension
time (Sec.)
Nil Nil Nil
6 Duration of
afterglow or
smouldering
time(Sec.)
25Sec 20Sec 18Sec
7 Burn Code
I/DNI)
Ignited Ignited Ignited
Remarks:Results of the specimen is satisfactory

7. Turkish Eric Golden (T.E.G)
Sl. No. Parameters Test 1. Test 2. Test 3. Requirement(mm)
1 Radius of the
affected area on
use surface side
(mm)
23 24 23
2 Radius of the
affected area on
under surface
side (mm)
Nil Nil Nil
3 Greatest Radius
of the affected
area (mm)
24≤ 75
4 Rime of Ignition
of reach the
clamping ring
(Sec.)
Nil Nil Nil
5 Flame Extension
time (Sec.)
Nil Nil Nil
6 Duration of
afterglow or
smouldering
time(Sec.)
18Sec 12Sec 12Sec
7 Burn Code
(I/DNI)
Ignited Ignited Ignited
Remarks:Results of the specimen is satisfactory

8. Turkish Vanya Black (T.V.B)
Sl. No. Parameters Test 1. Test 2. Test 3. Requirement(mm)
1 Radius of the
affected area on
use surface side
(mm)
18 17 18
2 Radius of the
affected area on
under surface
side (mm)
Nil Nil Nil
3 Greatest Radius
of the affected
area (mm)
18≤ 75
4 Rime of Ignition
of reach the
clamping ring
(Sec.)
Nil Nil Nil
5 Flame Extension
time (Sec.)
Nil Nil Nil
6 Duration of
afterglow or
smouldering
time(Sec.)
30Sec 27Sec 29Sec
7 Burn Code
(I/DNI)
Ignited Ignited Ignited
Remarks:Results of the specimen is satisfactory

9. PercianMulberry Red (P.M.R)
Sl. No. Parameters Test 1. Test 2. Test 3. Requirement(mm)
1 Radius of the
affected area on
use surface side
(mm)
20 21 20
2 Radius of the
affected area on
under surface
side (mm)
Nil Nil Nil
3 Greatest Radius
of the affected
area (mm)
21≤ 75
4 Rime of Ignition
of reach the
clamping ring
(Sec.)
Nil Nil Nil
5 Flame Extension
time (Sec.)
Nil Nil Nil
6 Duration of
afterglow or
smouldering
time(Sec.)
22 21 23
7 Burn Code
I/DNI)
Ignited Ignited Ignited
Remarks:Results of the specimen is satisfactory

10. Percian Eric Golden (P.E.G)
Sl. No. Parameters Test 1. Test 2. Test 3. Requirement(mm)
1 Radius of the
affected area on
use surface side
(mm)
22 18 21
2 Radius of the
affected area on
under surface
side (mm)
Nil Nil Nil
3 Greatest Radius
of the affected
area (mm)
22≤ 75
4 Rime of Ignition
of reach the
clamping ring
(Sec.)
Nil Nil Nil
5 Flame Extension
time (Sec.)
Nil Nil Nil
6 Duration of
afterglow or
smouldering
time(Sec.)
24 20 26
7 Burn Code
(I/DNI)
Ignited Ignited Ignited
Remarks:Results of the specimen is satisfactory

11. Percian Vanya Black(P.V.B)
Sl. No. Parameters Test 1. Test 2. Test 3. Requirement(mm)
1 Radius of the
affected area on
use surface side
(mm)
19 21 20
2 Radius of the
affected area on
under surface
side (mm)
Nil Nil Nil
3 Greatest Radius
of the affected
area (mm)
21≤ 75
4 Rime of Ignition
of reach the
clamping ring
(Sec.)
Nil Nil Nil
5 Flame Extension
time (Sec.)
Nil Nil Nil
6 Duration of
afterglow or
smouldering
time(Sec.)
35 36 34
7 Burn Code
(I/DNI)
Ignited Ignited Ignited
Remarks:Results of the specimen is satisfactory

12. Tibetian Mulberry Red(T.M.R)
Sl. No. Parameters Test 1. Test 2. Test 3. Requirement(mm)
1 Radius of the
affected area on
use surface side
(mm)
20 21 20
2 Radius of the
affected area on
under surface
side (mm)
Nil Nil Nil
3 Greatest Radius
of the affected
area (mm)
21≤ 75
4 Rime of Ignition
of reach the
clamping ring
(Sec.)
Nil Nil Nil
5 Flame Extension
time (Sec.)
Nil Nil Nil
6 Duration of
afterglow or
smouldering
time(Sec.)
33 30 31
7 Burn Code
I/DNI)
Ignited Ignited Ignited

13. TibetianEric Golden (T.E.G)
Sl. No. Parameters Test 1. Test 2. Test 3. Requirement(mm)
1 Radius of the
affected area on
use surface side
(mm)
21 19 20
2 Radius of the
affected area on
under surface
side (mm)
Nil Nil Nil
3 Greatest Radius
of the affected
area (mm)
21≤ 75
4 Rime of Ignition
of reach the
clamping ring
(Sec.)
Nil Nil Nil
5 Flame Extension
time (Sec.)
Nil Nil Nil
6 Duration of
afterglow or
smouldering
time(Sec.)
33 32 35
7 Burn Code
(I/DNI)
Ignited Ignited Ignited
Remarks:Results of the specimen is satisfactory

14. TibetianVanya Black (T.V.B)
Sl. No. Parameters Test 1. Test 2. Test 3. Requirement(mm)
1 Radius of the
affected area on
use surface side
(mm)
18 17 18
2 Radius of the
affected area on
under surface
side (mm)
Nil Nil Nil
3 Greatest Radius
of the affected
area (mm)
18≤ 75
4 Rime of Ignition
of reach the
clamping ring
(Sec.)
Nil Nil Nil
5 Flame Extension
time (Sec.)
Nil Nil Nil
6 Duration of
afterglow or
smouldering
time(Sec.)
42 41 40
7 Burn Code
(I/DNI)
Ignited Ignited Ignited
Remarks:Results of the specimen is satisfactory

15. Note: - 1. Method A: Mounting of specimen (Loose Laid)
2. Burn Code: I = Ignited, Did Not Ignite
RESULTS AND ANALYSIS
The time (seconds) from application of nut to extinction of flame.
The time (seconds) of any afterglow and smouldering after nut removal and extinction
of flame.
Time for effects of ignition to reach edge of clamping ring (seconds).
Radius of affected area (surface) in mm of each samples.