Dyed Fibre Products Rubbing Colour Fastness Tester Working Principle

The Dyed Fibre Products Rubbing Colour Fastness Tester is a device used to determine the color fastness of dyed fiber products such as textiles and fabrics. This instrument is widely used in the textile industry to assess the durability of color on various materials.

The working principle of the Dyed Fibre Products Rubbing Colour Fastness Tester involves rubbing a specified surface area of a test specimen against a piece of white fabric under controlled conditions. The rubbing motion is carried out using a friction head or a rubbing finger made of a standard material like cotton or wool.

The test specimen is securely fastened onto a sample holder, which is mounted onto the testing machine. The white fabric, also known as the rubbing cloth, is placed on the rubbing finger or friction head. The rubbing cloth is usually made of white wool or cotton fabric that has been thoroughly washed and pressed to ensure cleanliness.

The testing process begins by clamping the sample holder with the test specimen onto the machine and positioning the rubbing cloth against it. The rubbing cloth is set to a predetermined load and the rubbing motion is initiated. The rubbing motion can be carried out in various patterns, such as straight line or circular motion, depending on the specific test method being employed.

During the rubbing process, the white rubbing cloth comes into contact with the colored test specimen, and the friction between the two surfaces causes color transfer. The intensity of color transfer is evaluated by comparing the change in color of the rubbing cloth to a gray scale or color chart. The gray scale consists of different shades of grey, ranging from light to dark, and is used to determine the level of color transfer.

The color fastness of the test specimen is assessed by the degree of color transfer onto the rubbing cloth. A highly colorfast material will exhibit minimal or no color transfer, resulting in a low rating on the gray scale. On the other hand, a material with poor color fastness will show significant color transfer, resulting in a high rating on the gray scale.

The Dyed Fibre Products Rubbing Colour Fastness Tester allows manufacturers, retailers, and consumers to evaluate the color durability of dyed fiber products before they are used or sold. This helps in ensuring that the products meet quality standards and can withstand normal wear and tear without significant color fading or transfer.

In conclusion, the Dyed Fibre Products Rubbing Colour Fastness Tester works on the principle of rubbing a test specimen against a white rubbing cloth to evaluate the color fastness of dyed fiber products. By assessing the level of color transfer, this instrument provides valuable information about the durability of color on textile materials.