GB/T 250 Grey Scale for Evaluating Change in Color

Accurate Color Change Evaluation Made Simple

The GB/T 250 Grey Scale for Evaluating Change in Color is the trusted solution for professionals seeking precise and consistent color assessment standards. Designed to meet industry benchmarks, this product ensures accurate analysis of color variations across textile, leather, plastic, and other materials undergoing treatment or exposure to environmental changes. Ideal for quality control and laboratory testing, this grey scale significantly contributes to maintaining product integrity.

Precision and Durability for Professional Use

Crafted from high-quality materials, the GB/T 250 Grey Scale is both reliable and durable for frequent use. It adheres to stringent measurement guidelines, offering dependable results every time. With its ease of use and compatibility across various industries, this tool empowers professionals to detect even subtle degrees of color change effortlessly.

Compliant and Trusted Standard

Backed by industry regulations and widely recognized for its accurate assessment standards, the GB/T 250 Grey Scale is indispensable for quality assurance processes. Whether you’re conducting compliance tests or evaluating products in research labs, this tool ensures you meet rigorous color testing requirements with confidence.

GB/T 250 – Grey Scale for Evaluating Change in Color

GB/T 250 is a Chinese national standard used to visually assess color change of textiles and other materials after testing such as washing, rubbing, light exposure, or perspiration.

Purpose

It measures the degree of color change by comparing a tested specimen with an original (untested) sample using a standardized grey scale.

Scale & Ratings

The grey scale consists of 5 grades, with intermediate half steps:

• Grade 5 – No color change (Excellent)

• Grade 4–5 – Very slight change

• Grade 4 – Slight change

• Grade 3–4 – Slight to noticeable change

• Grade 3 – Noticeable change

• Grade 2–3 – Significant change

• Grade 2 – Severe change

• Grade 1–2 – Very severe change

• Grade 1 – Extreme color change (Poor)

Test Method (Overview)

1. Place the original and tested samples side by side.

2. Compare them under standard light conditions (e.g., D65 daylight).

3. Match the observed difference to the closest grey scale grade.

4. Record the grade as the color change rating.

Applications

• Textile washing fastness tests

• Rubbing (crocking) fastness tests

• Light fastness evaluation

• Perspiration and water fastness tests

• Quality control in textile, dyeing, and garment industries

Related Standards

• ISO 105-A02 – Grey scale for assessing change in color

• AATCC Gray Scale for Color Change

GB/T 250 is technically aligned with ISO 105-A02, so results are generally comparable.

If you want, I can also:

• write a product description for selling GB/T 250 Grey Scale

• prepare a datasheet/specification table

• or explain the difference between GB/T 250 and GB/T 251 (staining)

Description

This GB/T 250 Grey Scale is a textile color card is suitable for evaluating changes in color in color fastness tests. It is made of ISO, AATCC, and GB colorimetric data and is divided into 1-5 grades, half-level increments. The card is an international 5-level 9-speed specification type. It is divided into 1-5 grades. The standard is GB/T250-2008 and ISO 105/A02-1993.