Process

%

Chemical

^oC

Time(min)

PH

Comments

Washing

300

Water

40

0.2

Rockol  642

0.2

Formic acid

20

Drain

100

Water

35

Retannage I

4

Rockytan RHN

45

1.5

Rockenal DC

30

0.7

Sodium formate

30

4.3

Drain

Water

35

Neutralization

1

Sodium formate

30

0.6

Sodium bicarbonate

3×15

5.2

Check Ø with B.C.G

Drain

Washing

300

Water

35

5

Drain

80

Water

35

2

Rockol  LNE-918

Retannage II

3

Rockytan RE-808S

30

2

Rockytan RD

20

3

Rockytan R7

20

3

Rockytan RAB

3

Chest nut extract

Dyeing

3

Dye (green / black)

60

check Ø Penentration

Add

50

Water

50

Fatliquoring

3

Rockol LNP-375

2.5

Rockol OPS-322

1.5

Rockol OFM-345

2.5

Rockol FM-222

60

1

Formic acid

2×15

3.7

Drain

80

Water

60

Top dyeing

1.5

Dye (metal complex)

15

0.5

Chrome(26/33)

15

0.3

Cationic oil

15

Drain

Washing

200

Water

20

5