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Why is the inside of jeans white?
What's the most expensive part of a pair of jeans? You'd never guess, What jeans have been through before you put them on. Let's take a look at where the denim blue comes from first. The classic denim blue comes from the indigo. Indigofera tinctoria @ wikipedia Indigo is one of the oldest dyes in the world. It was originally made from the plant Indigoa tinctoria. However, Indigofera tinctoria is now rarely seen in nature. The indigo used to make denim now is the artificial ind invented by the German chemical company BASF at the end of the 18th century. Cotton threads are soaked in a large vat containing indigo dye and pulled out. This step is very important because indigo is originally green and only turns into the blue of jeans after reacting with oxygen in the air. However, the of the cotton threads dyed in this way is still very pure and white. This is why jeans turn white after being washed too much and worn for a long time and it is also the principle of how you can "raise" your pants and "play" with them. The dyeing is done, and now it's time weave the fabric. If you look closely at your jeans, you will find that there are two colors of threads inside. One is blue, and the other is also. No, the other is white. The blue cotton threads are called the warp (warp), and the white ones are called the weft (weft). like the meridians and parallels of the Earth, the warp and weft are perpendicular to each other. The most common weaving method for denim is the 31 weave, which means that from the front of the denim, every 3 blue warp threads correspond to 1 white weft thread, so the front of the looks blue. 3X1 weave So, when you turn your jeans inside out, you will see 3 white weft threads corresponding to 1 blue warp thread This is why it is whiter on the back. You may not know that the expensive goods in denim use a special weaving method called selvege. Selve means that it has a binding edge. This weaving method can only be made by the old-fashioned weaving machines from the 1950s. This old-fashioned machine is called a shuttle loom, and it can only produce 4 meters of fabric per hour. However, because its weaving speed is slower than that of modern machines, it causes less stress on the yarn and weaves a softer and more solid denim, which is very popular with consumers who are tough on the outside and soft the inside. However, this old-fashioned weaving machine requires more talented workers to operate, so currently only Japan and Italy, which have a long history of denim manufacturing, make this kind of selvege denim. After the denim is woven, it also needs to be pre-shrunk, which means letting it shrink in water onceThis is mainly to comfort you, in case you think you are getting fatter after washing your jeans once. Finally, before leaving the factory, there is also a control. Workers will circle the flaws in the fabric and curse them. Here's another way to identify genuine Levis and Lee. In the late 19th, Levis's jeans used a twill that extended from the lower left to the upper right, called right-hand twill (RHT). Right-hand twillTo be different from Levis, Lee used a twill that extended from the lower right to the upper left, called left-hand twill (LHT). In, consumers who can't even tell left from right don't care so much.
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C&Z Jeans
C&Z Jeans
C&Z Jeans