SDC Fading Grey Scale:

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The SDC Grey Scale adheres to international colorfastness testing protocols, including:

• ISO 105-A02 (Grey Scale for Assessing Change in Color)
• AATCC Evaluation Procedure 1 (Grey Scale for Stain and Color Change)
• BS EN ISO 105-A02 (British/European equivalent)
• JIS L 0801 (Japanese Industrial Standard for Grey Scale Assessment)

These standards ensure uniformity in color change evaluation, facilitating global trade and compliance.

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The Grey Scale operates as a visual reference tool:

1. Color Comparison: Users place the test specimen alongside the Grey Scale chips under standardized lighting (e.g., D65 illuminant).
2. Rating Assignment: The degree of color change is matched to the closest Grey Scale pair, with 1 = severe fading and 5 = no visible change.
3. Objective Grading: Half-step increments (e.g., 4-5) allow nuanced evaluation for borderline cases.

Test Principle & Applications

The Grey Scale is used in controlled testing environments to:

• Lightfastness Testing: Assess dye durability after xenon arc or weatherometer exposure (e.g., ISO 105-B02).
• Wash Fastness: Evaluate color bleeding or staining after laundering (AATCC 61, ISO 105-C06).
• Perspiration/Rub Fastness: Measure color retention under simulated wear (ISO 105-E04, AATCC 8).

Key Applications:

• Textile Manufacturing: Quality control for dyes and finishes.
• Retail: Verifying color consistency in garment production.
• Research: Developing fade-resistant pigments for automotive/aerospace textiles.

The SDC Fading Grey Scale is an indispensable tool for industries requiring precise colorfastness evaluation, offering a standardized, cost-effective solution to ensure product performance and customer satisfaction.