Understanding the Color Fastness To Washing Testing Machine GT-D07

Understanding the Color Fastness To Washing Testing Machine GT-D07

The color fastness of a fabric refers to the degree of fading or staining that occurs when a colored textile is exposed to various conditions during use or processing. It indicates the fabric’s ability to resist color change caused by external environmental factors such as light, washing, rubbing, or perspiration. Essentially, color fastness reflects how well a dyed fabric can retain its original color during practical use.

Washing and Color Fastness

Washing is one of the most common processes applied to textile materials used in garments. Most people wash their clothes at home, yet different textile types require different washing methods. During washing, we may often encounter problems like color fading or bleeding — when dyes dissolve into the washing water and transfer onto other fabrics.

What Is Washing Color Fastness Testing?

“Washing color fastness testing” evaluates the ability of a fabric to retain its color after repeated washing processes.

Since color plays a decisive role in consumers’ purchasing decisions, textile manufacturers and color experts must carefully select appropriate dyes and finishing methods for each fabric type. The test results provide an objective assessment of color performance, which directly influences product quality, appearance, and durability.

The testing results are typically evaluated in two aspects:

Color Change — the degree to which the original color of the dyed fabric fades or alters.

Staining — the degree to which color transfers onto adjacent white fabrics during washing.

These evaluations are based on the internationally recognized Grey Scale, rated from Grade 1 to Grade 5:

Grade 1 — severe fading or staining,

Grade 5 — no perceptible change, representing excellent color fastness.

Why Is Washing Color Fastness Testing Necessary?

Colour Fastness Tester to Washing GT-D07 apply to test dyeing textile color fastness changing degree after washing, it not only do washing color fastness and also dry washing color fastness test.

Key reasons for performing washing color fastness testing include:

Ensure consistent product quality: Helps manufacturers control dyeing processes to guarantee color stability across different fabric batches.

Meet international standard requirements: Complies with standards such as ISO 105-C06, AATCC 61, and GB/T 3921, ensuring export products achieve specified grades.

Enhance brand credibility: Fabrics with high colorfastness deliver superior user experience and extended service life.

Reduce post-sale complaints: Effectively mitigate risks of returns or exchanges caused by color fading or dye transfer issues.

Functions of the Washing Color Fastness Tester

1. GESTER Colour Fastness Tester design parameter conform to ISO, BS, AATCC, JIS & SDC those standards.
2. This machine’s box and its test cup adopt stainless steel material, it have anti-high temperature, acid-base, corrosion functions.
3. Equip with door safety switch, can protect from burning or injured.
4. Equip with auto temperature & time control, and the machine has alarm hint while experiment ending.
5. Can customize cup compound mode according to customers requirements.

Compliance with Multiple International Standards

ISO105-C01, C02, C03, C04, C05, C06, C08, C09, C10, D01, E03, E12
GB/T 5711, GB/T3921-1 to 5, GB/T12490 ; AATCC 3, 61, 62, 86, 132, 151, 190
JIS L0860, JIS L0844, JIS L0879; M&S C4A, C5, C37, P3B; BS 1006 NEXT 2,3,5
IWSTM 7,115,177,193, 240, 241; FTMS 191 Method 5610/5622
Through advanced washing color fastness testing equipment like the GESTER Color Fastness To Washing Testing Machine GT-D07, textile manufacturers can ensure that their fabrics not only meet global quality standards but also deliver vibrant, durable, and reliable colors — enhancing customer satisfaction and strengthening competitiveness in the global textile market.