The weight contained after adding standard moisture regain of the material with the oven dry weight is called correct invoice weight or conditioned weight is called correct invoice weight.
Formula for correct invoice weight are:
CIW = Oven dry weight + Standard moisture regain
Correct Invoice Weight Calculator
Result:
Correct invoice Weight
- C.I.W= Oven dry weight +standard moisture regain.
- Correct invoice weight = C(100+R1)/100
- Correct invoice weight = C(100+R+A+B)/100
Where (R+A+B) is the total allowance for M.R. natural
grease, wax, fatty matter, added oil, dressing etc.
R= Standard M.R
C= oven dry wet of the consignment
A,B = Impurities removed at the time of cleaning.
Oven dry weight of the consignment
W= The weight of the consignment at the time of sampling
C= Oven dry weight of the consignment
S= The original weight of the sample
d= The Oven dry weight of the sample (either with or without cleaning)
C= (Wd/S)
Oven Dry Weight of the Consignment Calculator
Result:
For samples dried out without cleaning
For samples dried out without cleaning, correct invoice weight formula are as
CIW= C{(100+R1)/100}
R1= Official allowance of moisture regain
CIW Calculator for Samples Dried Out Without Cleaning
Result:
For samples dried out without cleaning
For samples dried out without cleaning correct invoice weight,
CIW= C{(100+R+A+B)/100}
R+A+B= The total allowance for moisture regain, natural grease, wax, finally matter, added oil, dressing etc.
CIW Calculator for Samples Dried Out Without Cleaning
Result:
Examples
Problem-1:
20 tons of 40s ne 80/20 P/C yarn, 4% moisture content is shipped. What will be the CIW? [The official moisture regains of polyester and cotton 0.4% and 8.5%, respectively]
Solve: 20000Kg = W+D [1 Ton= 1000Kg]
MR of Cotton = 8.5%
MR of Polyester =0.4%
Moisture regain = 8.5*0.2+0.4*0.8
= 2.02%
Moisture content, 4% = (W/W+D)*100%
=>4/100 = W/20000
W= 800 Kg
Oven dry weight of the yarn, D= 20000-800
= 19200 Kg
Total water allowed = W
Moisture regain, 2.027% = (W/D)*100%
=>2.02/100 = W/19200
W= 387.84 Kg
Correct Invoice weight= 19200+387.84
= 19587.84 Kg
Problem-2:
Calculate the moisture regain and moisture content of cotton/viscose blend which having 60% cotton and 40% viscose in proportion.
Solve: We Know,
MR of Cotton = 8.5%
MR of Viscose =13%
MR of the mixture= 8.50.6+130.4
=10.3%
MC of the mixture= 100MR/(100+MR)
= (100*10.3)/(100+10.3)
= 9.34%
Problem-3:
If a worsted yarn has a count of 40Nw(Worsted Count) of a regain level of 20%, what would be the count of this yarn in tex, when it is oven-dried?
Solve: 40Nw = 40*560 yd/Ib
W+D= 1Ib
Oven dry weight of the yarn, D= (1-0.2)Ib
= 0.8 Ib
We know,
C= (W/W+D)*100%
=> 100R/(100+R)= (W/1 Ib)*100%
=> (100*20%)/(100+20%)= W/1Ib
W= 0.2 Ib
After oven drying the count of the yarn is= 22400 yd/ 0.8 Ib
= 22400/0.8 yd/Ib
= 28000 yd/Ib
= 1/28000 Ib/yd
= 454/28000g/yd
= 454/28000g/0.9144m
= 454/(28000*0.9144)g/m
= (454*1000)/(28000*0.9144)g/Km
= 17.73 tex
Problem-4:
Calculate the MR and MC of 50/50 wool/viscose blend.
Solve: MR of viscose = 13%
MR of wool = 17%
MR of the mixture = 130.5+170.5
= 15%
MC of the mixture = (100*15)*(100+15)
= 13.04%
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