Color Fastness Automatic Grading System

The Color Fastness Automatic Grading System is a precision instrument designed to evaluate textile colorfastness, including color change, staining, rubbing fastness (dry and wet), and lightfastness. Traditionally, colorfastness evaluation relied on experienced graders using standard lightboxes and grey scales. This system combines LED active illumination with RGB imaging technology to automatically capture color and appearance, providing accurate digital grading and performance evaluation.

Application

The instrument is suitable for:

(1) Textile manufacturing: assessing colorfastness of fabrics, yarns, and finished garments.

(2) Quality control laboratories: automatically grading color change, staining, and lightfastness for batch inspection.

(3) R&D departments: evaluating new dyes, pigments, and fabric treatments.

(4) ERP-integrated quality management: uploading colorfastness data for product tracking and analysis.

(5) Standard compliance verification: ensuring adherence to domestic and international colorfastness standards.

(6) Garment and apparel industry: evaluating color durability under friction and exposure conditions.

(7) Textile testing institutions: providing reproducible and objective digital grading results for certification.

Standards

The system complies with domestic and international textile standards, including:

(1) GB/T 39648-2020 – Textiles – Colorfastness test – Digital image technology grading

(2) ASTM D1729 – Standard test method for colorfastness

(3) ISO 3664 – Viewing conditions for graphic technology and photography

(4) DIN standards for color measurement and lightfastness

(5) AATCC standards – Colorfastness to light, crocking, and washing

(6) BSI textile color standards

Technical Specifications

Instrument Features

(1) LED active illumination with RGB imaging captures accurate color and appearance.

(2) Automatic grading for color change, staining, rubbing, and lightfastness performance.

(3) ERP-compatible for digital data management and enterprise quality control.

(4) High stability and uniform illumination with long LED lifespan.

(5) Digital, reproducible results reduce human subjectivity in grading.

(6) Compatible with multiple international standards for global use.

Accessories

(1) Standard sample holder

(2) LED light box

(3) Calibration color tiles

(4) Data acquisition and analysis software

(5) USB/network interface for data transfer

Test Procedures / Maintenance

(1) Place textile sample on the sample holder, ensuring alignment within the measurement area.

(2) Select grading mode (color change, staining, rubbing, or lightfastness) in the software.

(3) Start automatic measurement: the LED light source illuminates the sample while the camera captures color data.

(4) The system calculates color difference, grading scores, and generates digital reports.

(5) Upload results to ERP or export as CSV/PDF for documentation.

(6) Clean the light box, sample holder, and camera lens regularly.

(7) Periodically calibrate LED light source and camera using standard color tiles to maintain measurement accuracy.