Process

%

Chemical

^oC

Time(min)

PH

Comments

Washing

200

Water

40

0.3

Rockol 642

0.2

Formic acid

20

Drain

100

Water

35

Retannage I

3

Chrome ( 26 / 33 )

2

Rockytan RHN

0.3

Sodium formate

2

Rockol OFL

90

1

Sodium formate

30

4.4

O.N(Run 5 min–stop1hr)

Drain

150

Water

35

Neutralization

1.5

Sodium formate

1

Sodium bicarbonate

3×15

5.2

Check Ø with B.C.G

Drain

Washing

300

Water

35

5

80

Water

35

1.5

Rockol OPS-322

10

Retannage II

4

Rockytan RE-808S

30

4

Rockytan RR7

30

3

Rockytan RD

30

3

Chest nut extract

3

Rockytan RAB

Dyeing

3

Dye

60

Check Ø  penetration

0.3

Formic acid

20

4.5

Drain

80

Water

50

Fatliquoring

3

Rockol LNP-375

4

Rockol LNE-918

2

Rockol OPS-322

60

0.3

Formic acid

2×15

1.5

Rockytan ROS

20

0.5

Formic acid

2×15

3.7

Drain

Washing

300

Water

20

5