How to test the color fastness of Yarn Dyed Shirt Fabrics?- Changzhou Chenhong Textile Co., Ltd.

Testing the color fastness of yarn-dyed shirt fabrics is an important step to ensure that the colors remain stable and do not significantly fade or bleed during use, washing, or exposure to various conditions. Here's a general outline of how to test color fastness in yarn-dyed shirt fabrics:

Gather Materials:

Fabric samples: Obtain samples of the yarn-dyed fabric you want to test.

Colorfastness testing materials: This may include rubbing cloth, detergents, water, and potentially other chemicals.

Light fastness equipment: If you're testing for light fastness, you'll need a device that can simulate exposure to light over time.

Select Test Methods:

Depending on what aspects of color fastness you want to test, there are several methods you can use:

Rubbing Fastness (Crocking): This test checks if the color transfers from the fabric to other surfaces through friction. A rubbing cloth is rubbed against the fabric, and any color transfer is assessed.

Washing Fastness: This test evaluates how well the colors hold up after multiple wash cycles. The fabric is subjected to washing using specified conditions, including temperature, detergent, and agitation.

Perspiration Fastness: If the fabric is likely to come into contact with sweat, this test assesses colorfastness to perspiration.

Light Fastness: This test determines how well the colors resist fading when exposed to light. A controlled light source is used to simulate daylight conditions over a specified period.

Perform the Tests:

Follow the test procedures and conditions as specified by relevant standards (such as ISO or ASTM standards) or industry best practices. These procedures will vary depending on the specific fastness test you're conducting.

For rubbing fastness, apply the rubbing cloth with a defined pressure and number of rubs, and then evaluate any color transfer.

For washing fastness, wash the fabric samples along with a standard fabric using a washing machine. After the specified number of wash cycles, assess color changes.

For light fastness, expose the fabric samples to controlled light conditions for a defined period. Compare the samples to reference standards to determine color changes.

For perspiration fastness, simulate sweat using a standardized solution and assess color changes.

Assess Results:

After each test, compare the tested fabric samples to reference standards. Use a color assessment scale or a colorimeter to quantitatively measure color changes.

Document any noticeable color changes, fading, bleeding, or other issues.