# Textile Calculation

Problems and solutions of textile

## Dyes and Chemicals Measuring Formula for Laboratory

Dyes and Chemicals Measuring Formula for Laboratory

Rana Sohel
Executive Engineer
Sunman Textile Mills Ltd. Chittagong
Cell: +8801912-420118
Email: rsohel07tex@gmail.com

Introduction:
Dyes and chemicals are measured in lab. Lab Dip Development means the sample which is dyed according to buyer’s requirements (similar shade and so on). Depending on lab dip development sample dyeing and bulk production dyeing planning done. Preparation of Concentration of stock dye soln -
Normally 0.1%, 0.5%, 1%, 1.5% and 2% stock solution of dyes are prepared in beakers for daily used.

Preparation of Concentration of stock chemical soln -

Similarly 25% salt and 25% soda stock solutions are prepared in beakers for daily use.

The amount of dye solution (ml) is calculated as follow –

Fabric weight x Shade %
Amount of dye soln (ml) = ----------------------------------------
Concentration of stock dye soln %

***Example –
1. In recipe, Fabric wt. = 5gm
2. Shade % = 2%
[If used 0. 5 % stock soln of dyes ] then ,

5 X 2
Amount of dye soln (ml) = --------- = 20ml .
0. 5

The amount of chemical soln (ml) is measured as follow -

Fabric wt. * M : L * g/l
Amount of chemical soln (ml) = --------------------------------------
1000 * Conc. of stock soln %

***Example –
1. In recipe, Fabric wt. = 5 gm
2. Salt = 20 g/l
3. M: L = 10
[ if taken 25 % stock soln of salt ] then ,

5 x 10 x 20
Amount of chemical soln (ml) = ----------------------------------- = 4 ml
1000 x 0.25