How toning and dyeing production are calculated?

1. Calculation related to dyeing and proofing prescription

Calculation formula

(1) In the case of dip dyeing, the volume requirement of the dye solution is calculated as follows:

V = m × f

In the formula: V---- the volume of dye solution required for dyeing, mL or L

m——the mass of the dyed sample, g or kg;

f------ dyeing bath ratio,.

2. Calculation of volume requirement of dye mother liquor

V = m×C/C. ×10³

In the formula: V----required dyestuff mother liquor volume, mL;

m --- the mass of the dyed sample, g;

C. ---- Dye mother liquor concentration, g/L;

(3) Calculation of the required amount of additives;

V= C×V×10³

In the formula: m---the mass of the required additives, g;

C----Auxiliary concentration, g/L

V --- volume of dye solution, mL

Example

Example 1: The fabric is 2g, the liquor ratio is 1:50, the dye concentration is 0.5% (owf), and the dye-promoting salt sodium sulfate concentration is 5g/L.

ask :

(1) How many mL of 2g/L dye stock solution should be drawn?

(2) How many grams of sodium sulfate are weighed?

(3) How many mL of water should be added?

answer:

According to the bath ratio, the total volume of the prepared dye solution is: 50×2=100mL

(1) Suppose the volume of the absorbed dye mother liquor is V, then there are:

Fabric quality (g) × 0.5% = dye mother liquor concentration (g/L) × V (mL) × 10﹣³

V=2×0.5%/2×10³=5(mL)

(2) Weigh the quality of sodium sulfate as:

Dyeing salt concentration × total volume of dye solution = 5 × 100 × 10﹣³ =0.5

(3) The volume of water that needs to be added to prepare the dye solution is:

100﹣5=95mL

Example 2:

Draw 10mL of 2g/L dye mother liquor, dye 2g fabric, the liquor ratio is 1:50, what is the concentration of dye at this time?

Answer:

Dye concentration = dye mother liquor concentration × V × 10﹣³ / fabric quality × 100%

2×10×10﹣³ /2×100% =1%