1. Faculty of Engineering
Department of Textile Engineering

2. Submitted By
Yousuf Ali
103-23-2102
Md. Nasir Uddin
103-23-2207
Md. Abu Owaheduzzaman
093-23-1785

3. According to Textile Terms and Definition ‘Denim is
traditionally a 3/1 warp face twill fabric made from
yarn dyed warp and un-dyed weft yarn’
3/1 RHT 3/1 LHT

4.  The word ‘denim’ probably came from the name of
France, “serge de nimes” – serge (a kind of
material/fabric) from Nimes (a town in France) at 17th
century.
 Leob Strauss started a wholesale business of denim at
the first of 18th century in America by the name of
Levi.
 Cowboys – who often wore denim in the movies –
became very popular at around 1930 which lead to an
increased interest in the rugged trousers.

5.  Fewer jeans were made during the World War 2 at 1943
for American soldiers. After the war, rival companies,
like Wrangler and Lee, began to compete with Levi’s
for a share of the international market.
 Denim became very popular with young people in the
1950′s. Some schools in the US went so far as to ban
students from wearing denim at that time.
 Manufacturers started to make different styles of
denim to match the 1960′s fashions.
 Denim become fashionable cloth at around 1990’s.
 And now denim is the most usable cloth for men and
women for all ages.

6.  Slasher Denim: Dyeing and sizing are done in form of
sheet/ slasher simultaneously and that is why the
process is also called sheet dyeing and the denim is
sheet denim.
 Rope Denim: Warping and dyeing are done in the form
of rope and dyeing sizing is done separately.

7. Direct
warping
Creeling
Pre-wetting
Cold
Wash
Cold
Wash
Dyeing(6
bath)
Cold
Wash
Hot
Wash
Hot
Wash
Cold
Wash
Drying
Sizing

9. Ball
warping
creeling
Pre-wetting
Cold
wash
Cold
wash
Dyeing
(10 bath)
Cold
wash
Hot wash
Hot wash
Cold
wash
Storage

11.  100% cotton or polyester blend yarn is used where
count range is 7OE to 40OE for slasher and up to 20OE
for rope.
 Steel for zipper, snaps and buttons.
 Leather, plastic for level.

12.  Indigo vat dye: it is natural organic dye achieved
from plant. But now several thousand tons of indigo
produced each year — is synthetic.

13.  Sulphur Dye: These dyes are so called because they
contain sulphur atoms in their molecules.

14. Criteria
 Required floor space
 Man power
 Count
Comparison
 Floor space is
comparatively
higher for rope
denim production

15. Criteria
 Required floor space
 Man power
 Count
Comparison
Less man power
required for
slasher denim
production.

16. Criteria
 Required floor space
 Man power
 Count
Comparison
Higher count is
used for slasher
denim.

17. Criteria
 Lapper tendency
 Dye bath capacity
 Shade variation.
Comparison
Lapper tendency
is higher in rope
dyeing than
slasher dyeing.

18. Criteria
 Lapper tendency
 Dye bath capacity
 Shade variation.
Comparison
Dye bath capacity
of slasher is lower
than rope dyeing
machine .

19. Criteria
 Lapper tendency
 Dye bath capacity
 Shade variation.
Comparison
Lower shade
variation in rope
dyeing process.

20. Criteria
 Production
 breakage rate
 Wastage
Comparison
 Production of
rope denim is
about 50% higher
than slasher
denim.

21. Criteria
 Production
 Breakage rate
 Wastage
Comparison
 Breakage rate of
Slasher is higher
than rope
method.

22. Criteria
 Production
 breakage rate
 Wastage
Comparison
Wastage of
Slasher is higher
than rope
method.

23. Criteria
 Production of Stripe
fabric
 LCB process
 warping.
Comparison
 Stripe fabric can
be produced only
by rope method.
Not possible for
slasher.

24. Criteria
 Production of Stripe
fabric
 LCB process
 warping.
Comparison
No need of LCB
process for slasher
method. For rope,
it is need to do re-beaming.

25. Criteria
 Production of Stripe
fabric
 LCB process
 warping.
Comparison
 Direct warping is
done for slasher
while, ball
warping for rope
method.

26. Denim type Weight (oz/sq.
yd)
Sheet denim
(price)
Rope
denim(price)
Regular 6-14 1.55 to 2.1 $ 1.75 to 2.25 $
Multi count 6-14 1.75 to 2.15 $ 1.9 to 2.35 $
Slub 6-14 1.8 to 2.25 $ 1.95 to 2.45 $
Stretch(regular) 10-12 2.15 to 2.65 $ 2.35 to 2.85 $
Stretch(multi
count)
10-12 2.40 to 2.80 $ 2.55 to 3.0 $
Stretch(slub) 10-12 2.40 to 2.90$ 2.60 to 3.10 $

27.  Sales price of denim is about 1.5 $ to 3.0 $ per
oz.
 Price of slasher denim per oz is about 1.5 $ to
2.9 $.
 Rope denim price is about 1.75 $ to 3.0 $ per
oz.
 Sales price of rope denim is 7 to 9.3% higher
than slasher denim.

28. Count: slasher-7 to 40 Ne. rope up to
20 Ne.
 Breakage rate: higher at slasher.
Man power: higher at rope.

29. Lapper tendency: higher at rope.
 Production rate: higher for rope.
Shade variation: frequently seen at
slasher.
Wastage: higher at slasher.

30.  Stripe fabric: possible at rope method
for LCB.
Tensile strength: higher at rope denim.
Color fastness: better for rope denim.