Steps

Process

Water

(L)

Temp

(˚C)

pH

Time

(Min)

Chemicals

Doses

M: L

Potassium permanganate spray

Potassium permanganate

30 gm./l

Phosphoric acid

4 gm./l

1

Enzyme

600

40

7

55

Cellulase enzyme

800 ml

1:10

Anti-back staining agent

1200 ml

Citric acid

300 ml

Stone

100 kg

2 - 3

Rinse-2

1200

30

5

1:20

4

Bleach

700

50

10

15

Stable bleaching powder

5 kg

1:11

5

Rinse-1

600

30

5

1:10

6

Neutral

600

50

6-7

10

Neutralizing agent

1 kg

1:10

Anti-back staining

800 ml

7 - 8

Rinse-2

1200

30

5

1:20

9

Tint

500

50

6-7

5

Direct dye (Orange)

1 gm

1:8

Direct dye (Red)

350 ml

Glauber salt

1 Kg

10

Rinse-1

600

30

3

1:10

11

Fixing + Softening + pH controlling

500

40

5

10 + 3 + 3

Fixing agent

500 ml

1:8

Softener

500 ml

Acetic acid

200 ml

6500

=119 mins + drying 60 mins = 179 mins