Fibers of Textile Materials (V): Fiber Identification IV
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5. Drug Coloring Method
The drug coloring method is used to quickly identify fibers based on their different coloring properties for certain chemicals. This method is applicable to undyed fibers or undyed pure spun yarns and fabrics. Commonly used colorants include iodine-potassium iodide solution and No. 1 colorant. During identification, the sample can be put into slightly boiling colorant and boiled for dyeing for 1 minute. After dyeing, take out the fiber, wash it with water and observe the color. For wool, silk and nylon, the method of boiling dyeing for 3 seconds can be used to expand the hue difference. The coloring reactions of several fabric fibers are shown in the table below:
| Fiber type | Iodine-potassium iodide solution | Color No. 1 |
| Cotton | No color | grey |
| hemp (ramie) | No color | Qinglian |
| Bamboo fiber | Black, blue and green | — |
| Wool | Light yellow | Red Lotus |
| Silk | Light yellow | Deep Purple |
| Viscose fiber | Black, blue and green | Green |
| Modal fiber | Black, blue and green | — |
| Lyocell fiber | Black, blue and green | — |
| Cupro fiber | Black, blue and green | — |
| acetate | Yellow | Orange |
| Polyester | No color | Red Jade |
| Nylon | Black and brown | Jianghong |
| Polyacrylonitrile fiber | Brown | Peach red |
| Vilon | Blue gray | Rose Red |
| Chlorine | No color | — |
| Polypropylene | No color | Goose Yellow |
| Spandex | — | turmeric |
6. Finishing method
Use ultraviolet light to illuminate the fibers, and identify the fibers according to the different properties of the fibers, that is, the different fluorescence colors. The fluorescence colors of commonly used fibers are shown in the table below:
| Fiber type | Finish color | |
| Cotton | Light yellow | |
| Silk finished cotton | Light red | |
| Jute (raw) | purple brown | |
| Jute | Light blue | |
| Wool | Light yellow | |
| Silk (degumming) | Light blue | |
| General viscose fiber | — | |
| Polypropylene | No color | Goose Yellow |
| Spandex | — | turmeric |
6. Finishing method
Use ultraviolet light to illuminate the fibers, and identify the fibers according to the different properties of the fibers, that is, the different fluorescence colors. The fluorescence colors of commonly used fibers are shown in the table below:
| Fiber type | Finish color |
| Cotton | Light yellow |
| Silk finished cotton | Light red |
| Jute (raw) | purple brown |
| Jute | Light blue |
| Wool | Light yellow |
| Silk (degumming) | Light blue |
| General viscose fiber | White purple shadow |
| Wonder viscose fiber | Light yellow purple shade |
| Polyester | The white color is very bright |
| Nylon | Light blue |
| Vilon, polyester | Light yellow purple shade |
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Through the above description of “Fibers of Textile Materials (V): Identification of Fibers IV“, what are your thoughts on “Fibers of Textile Materials (V)” 5): What is your understanding and thoughts on “Fiber Identification Four“, or if you are interested in purchasing fabrics, you are welcome to post your comments below the website!
Disclaimer:
Disclaimer: Some of the texts, pictures, audios, and videos of some articles published on this site are from the Internet and do not represent the views of this site. The copyrights belong to the original authors. If you find that the information reproduced on this website infringes upon your rights and interests, please contact us and we will change or delete it as soon as possible.
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