**Dyeing Calculation in Lab Dip**

**Rana Sohel**

Executive Engineer

Sunman Textile Mills Ltd. Chittagong

**Cell:**+8801912-420118

**Email:**rsohel07tex@gmail.com

**Dyeing Calculation**

At the initial stage of

**dyeing calculation**, needs to calculate the lap deep before go for bulk productions. For this a lots of work is done in the dyeing laboratory. In the dyeing lab, lab dip or sample is developed by the dyeing master.**Lab dip**plays an important role in shade matching & this is an important task before bulk production.Dyeing calculation in lab dip |

**Sample recipe:**- Material weight = 5.0 gm
- Wetting agent = 0.5 g/l
- Sequestering agent = 2.0 g/l
- Antipilling agent = 1 g/k
- Dyes = 1.5%
- Glauber salt = 40 g/l
- Soda ash = 10 g/l
- M : L = 1 : 10

**Stock Solution Concentration:**

- Wetting agent, sequestering agent and anti-pilling agent = 1.0%
- Dyes = 1.0%
- Salt, soda ash = 20%

**Dyeing Calculation:**

**1. Total amount of liquor**= 5 X 10 = 50 ml

**2. Required wetting agent**= [{ Total liquor (lit) X Recipe amount in gm/l} / Stock solution%]

= [{(50 ml/1000 ml) X 0.5 g/l} / 1.0%]

= 2.5 ml

**3. Required sequestering agent**= [{ Total liquor (lit) X Recipe amount in gm/l} / Stock solution%]

= [{(50 ml/1000 ml) X 2 g/l} / 1.0%]

= 10 ml

**4. Required antipilling agent**= [{ Total liquor (lit) X Recipe amount in gm/l} / Stock solution%]

= [{(50 ml/1000 ml) X 1.0 g/l} / 1.0%]

= 5 ml

**5. Required amount of glauber salt**= [{ Total liquor (lit) X Recipe amount in gm/l} / Stock solution%]

= [{(50 ml/1000 ml) X 40 g/l} / 20%]

= 10 ml

**6. Required amount of soda ash**= [{ Total liquor (lit) X Recipe amount in gm/l} / Stock solution%]

= [{(50 ml/1000 ml) X 10 g/l} / 20%]

= 2.5 ml

**7. Required Dye solution**= [{Material weight X recipe amount % (or shade %)} / Stock solution%]

= {(5.0 gm X 1.5%) / 1.0%}

= 7.5 ml

**8. Required amount of additional water**= {50 – (2.5 + 10+5+7.5+10+2.5)} ml

= (50 – 37.5) ml

= 12.5 ml