How to identify genuine imitation indigo-dyed denim?

Indigo-dyed denim has been a popular clothing item for decades, and it’s no secret that many brands produce imitation versions of this iconic fabric. However, it can be challenging to identify genuine imitation indigo-dyed denim. we’ll go over some tips to help you distinguish between real and fake indigo-dyed denim.

Genuine indigo denim is colored with natural or synthetic indigo dyes, but it can also be imitated with sulfide dyes, reducing dyes, or direct dyes. The way to identify the real imitation indigo dye is as follows.
  ①A drop of concentrated nitric acid will be lightly coated on the color specimen, if it is an indigo dye, the station will be a white spot, and its edge is green.
  ② will be colored specimens in the flame on the ignition, stand that is, leave the flame, placed in a white porcelain plate, due to the heat sublimation of indigo in the white porcelain plate leaving blue traces of other dyes are not this phenomenon.
  ③Take the coloring specimen and cut it into pieces and put it in a glass test tube and put it on an alcohol lamp to be heated and dried. Indigo is vaporized by heat, red gas escapes, and there is a blue precipitate after cooling in the glass test tube.
  ④ The colored specimen can be circulated with a dimethylformamide (DMF) solution. If it is a real indigo dye, the dye on the specimen can be extracted by all and become colorless, while the dye of other imitations cannot be extracted by all.


Check the Color
The first thing to look for in genuine imitation indigo-dyed denim is the color. Authentic indigo-dyed denim has a deep blue color that fades over time, creating a unique patina. Imitation indigo-dyed denim, on the other hand, often has a more uniform, bright blue color that does not fade as well.

To check the color, look for areas of the fabric that have worn or faded. If the color is consistent throughout, it’s likely not genuine imitation indigo-dyed denim.

Look for a White Core
Another way to identify genuine imitation indigo-dyed denim is to look for a white core. Indigo-dyed denim is created by dipping the fabric in indigo dye, which only penetrates the outer layers of the fibers. This results in a white core that becomes more visible as the fabric fades.

If the fabric has a uniform blue color without a visible white core, it’s likely not genuine imitation indigo-dyed denim.

Check the Weave
The weave of the fabric can also give you an indication of whether it’s genuine imitation indigo-dyed denim or not. Authentic indigo-dyed denim has a tight, durable weave that can withstand heavy wear and tear. Imitation indigo-dyed denim often has a looser weave that is less durable.

To check the weave, hold the fabric up to the light and look for any gaps or holes. If the weave is loose or irregular, it’s likely not genuine imitation indigo-dyed denim.

Check the Price
Finally, the price of the denim can give you an indication of whether it’s genuine imitation indigo-dyed denim or not. Authentic indigo-dyed denim is typically more expensive than imitation versions because it requires a more labor-intensive dyeing process.

If the price of the denim seems too good to be true, it’s likely not genuine imitation indigo-dyed denim.

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