**What is Lab Dip or Lab Deep Calculation in Textile Dyeing?**

Lab dip or lab deep has great importance in shade matching. Normally it is developed by a dyeing master or chemist in

**textile wet processing**. Lab dip has been done before going to bulk production. The total**dyeing**production is relay on it. As its importance, this article has presented an easy method for calculating lab dip in the**textile dyeing**industry. You can follow also the other article on**dyeing recipe calculation in the textile wet processing sector**.**How to Convert Percentage (%) to gm/l in Textile Dyeing?**

The whole conversion can be calculated by using the following formula:

X×10

Y =…………………………………..……….….. (Gm/l)

Liquor ratio (only L value)

**Where,**

X indicates the shade percentage,

Y indicates the required amount in gm/l.

**Example:**

Let, the shade percentage of a dyeing shade is 2.5% and liquor ratio (M: L) is 1:10

Now, from the above equation, we get,

2.5×10

Y=…………..…

10

= 2.5gm/l

**How to Convert gm/l to Percentage (%) in Textile Wet Processing?**

By following the below formula we can solve the above question-

Y× Liquor ratio (only L value)

X =……………………………………….…………… (%)

10

**Where,**

X indicates shade%,

Y indicates the required amount in gm per liter (gm/l).

**Example:**

Let, the recipe amount of soda ash is 2.5gm/l and liquor ratio is 1:10

From the above formula we get,

2.5×10

X=…………………….

10

= 2.5%

**Lab Deep or Lab Dip Calculation Method Followed in Textile Wet Processing:**

**Sample recipe:**

Material weight= 5gm,

Soda ash= 10gm/l,

Ant pilling agent= 1gm/l,

Sequestering agent= 2gm/l,

Wetting agent= 0.5gm/l,

**Dyes**= 1.5%

Glauber salt= 40gm/l,

M: L = 1:10

**Stock Solution Concentration:**

- Salt and soda ash= 20%,
- Dyes= 1%,
- Wetting agent, sequestering agent, and anti-pilling agent= 1%

**Laboratory Dyeing Calculation:**

**1. Total amount of liquor,**

= (5×10) ml

= 50ml

= (50/1000) l

= 0.05l

**2. Necessary amount of soda ash,**

Recipe amount in gm/l × Amount of liquor (liter)

=…………………………………………………………………………………………

Percentage of Stock solution

10×0.05

=…………………..

20%

= 2.5ml

**3. Necessary amount of anti-pilling agent,**

Total amount of liquor (liter) × Recipe amount in gm/l

=…………………………………………………………………………

The stock solution in percentage

0.05×1

=…………………

1%

= 5ml

**4. Necessary amount of sequestering agent,**

Amount of recipe in gm per liter × Total amount of liquor in a liter

=……………………………………………………………………………..………………………………………

Stock solution%

0.05×2

=…………………

1%

= 10ml

**5. Necessary amount of wetting agent,**

The total amount of liquor in liter × amount of recipe in gm per liter

=……………………………………………………………………………………………………………………

Stock solution percentage

0.05× 0.5

=………………………

1%

=2.5ml

**6. Necessary amount of dye solution,**

Weight of material× recipe amount in percentage or shade%

=……………………………………………………………………………………………………………..

Stock solution%

5×1.5%

=……………………

1%

= 7.5 ml

**7. Necessary amount of Glauber salt,**

Total liquor in liter × recipe amount in gm per liter

=……………………………………………………………………………………..……………

The stock solution in percentage

0.05×40

=…………………..

20%

= 10ml

**8. Necessary amount of additional water,**

= {50ml- (2.5+10+5.0+7.5+10+2.5) ml}

= (50-37.5) ml

= 12.5 ml