Moisture Regain and moisture content

 

Moisture Regain:

Moisture regain is defined as the percentage of water present in a textile material of oven dry weight.

The percentage of moisture in a textile material brought into equilibrium with a standard atmosphere after partial drying, calculated as a percentage of the moisture-free weight.

Let,

Oven dry weight = D

Weight of water = W (= Original weight- oven dry weight)

Moisture Regain = MR or R

Then,  MR  (%) =  100 W/ D

Moisture Content:

Moisture content is defined as the weight of water in the material expressed as a percentage of the total weight.

Let,

Oven dry weight = D

Weight of water = W (= Original weight- oven dry weight)

Moisture Content = MC or C

Then, MC (%)  =    100 W/( W + D)

Oven Dry Weight: The constant weight obtained by drying textiles at a specific temperature of 105 ± 3^oC

Standard Moisture Regain:

The moisture absorbed by a particular weight sample in the standard atmosphere after treating at 105±3^oC is called Standard Moisture Regain. It is also called official regain.