How Is The Shrinkage Rate Of The Fabric Calculated?
- Oct 17, 2019-
The shrinkage of the fabric refers to the percentage of fabric shrinkage after the fabric is washed or soaked. In general, the fabric with the largest shrinkage rate is synthetic fiber and its mixed textiles,
followed by wool, hemp fabric, cotton fabric centered, shrinking water, and the largest is viscose fiber, rayon, artificial wool fabric.
The correct shrinkage method for testing fabrics should be the same as that for large garments. If the garments are not washed, the fabrics can be measured by pumping them with a steaming iron.
The shrinkage rate of the fabric can generally be divided into 1: natural shrinkage, natural shrinkage refers to the natural shrinkage of the fabric after ironing in the production of large goods or after the fabric is relaxed;
2: washing shrinkage, washing shrinkage refers to the garment washing after washing shrink. The correct shrinkage method for testing fabrics should be the same as that for large garments. If the garments are not washed,
the fabrics can be measured by pumping them with a steaming iron.
The formula for calculating the shrinkage rate of the fabric:
Shrinkage rate = 1 - fabric length ÷ fabric shrinkage rate
If a fabric shrinks by 1%, 100 meters * (1-0.01) = 99 meters;
Shrinkage rate: It is the fabric's own, provided by the manufacturer. If you want to calculate, you must experiment. For example, use 10 meters of cloth, water, and then measure, the result is 9.95 meters, (10-9.95)/10*100=0.5%.
The shrinkage ratio is 5%, that is, the ratio of the area of the cotton before and after washing is 100:95.