James H Heal Gray scale price in Bangladesh

Gray Scale

  The Gray Scale is a visual tool used in the textile and dyeing industry to evaluate and grade the color change or staining of a fabric after testing (e.g., washing, rubbing, and light exposure). It helps assess how much a fabric's color has altered or transferred during durability or fastness tests. Types of Gray Scale:

1. Gray Scale for Color Change - Compares the original and tested sample to measure color fading or alteration.
2. Gray Scale for Staining - Compares a white adjacent fabric (before and after testing) to assess color transfer or staining.

Rating System : - Uses a 1 to 5 scale: - Grade 5: No change or staining (excellent) - Grade 1: Severe change or heavy staining (poor) Intermediate grades (like 4–5, 3–4, etc.) are also used for finer evaluation.   Construction :- Each scale includes pairs of gray chips with varying contrast levels to visually match the test results. Usage Areas:- Textile testing labs- Dyeing and finishing quality control- Standards like ISO, AATCC, and BIS tests   Benefits :

1. Standardized Evaluation - Provides a consistent and objective way to assess color change or staining.
2. Simple and Quick to Use - Enables rapid visual comparison during fabric testing.
3. Widely Accepted - Complies with international standards (ISO, AATCC) for color fastness grading.
4. Cost-Effective Tool - Inexpensive yet essential for reliable quality control in textiles.

 

5. Enhances Quality Assurance - Helps detect dyeing or printing issues before bulk production.
6. Supports Multiple Tests - Used for evaluating wash fastness, rubbing fastness, perspiration, light exposure, and more.
7. Portable and Durable - Easy to carry and long-lasting with proper care.

Features :

1. Dual Type Availability - Comes in two types: for Color Change and for Staining.
2. 5-Point Grading System - Grades from 1 (poor) to 5 (excellent), with half-step intervals like 4–5, 3–4.
3. Standardized Grey Chips - Includes contrasting grey color pairs to match fabric changes accurately.
4. Compact Design - Small, portable card or booklet format for easy lab and field use.

 

5. Durable Material - Made from stable, fade-resistant plastic or cardboard for long-term use.
6. Compliance with Standards - Follows ISO 105-A02 (Color Change) and ISO 105-A03 (Staining) norms.
7. Easy Visual Comparison - Designed for quick side-by-side assessment of fabric before and after testing.

  How to Use : Select the Right Gray Scale - Use Color Change scale to check fading, or staining scale to check color transfer.

1. Place the Samples - Lay the untested (original) and tested fabric side by side (for color change)

- Or place the adjacent white fabric next to the gray scale (for staining).

3. Match Against Gray Scale Chips - Visually compare the difference between the samples and find the closest matching gray pair on the scale.

 

4. Assign a Grade

- Grade from 1 to 5, where: - Grade 5 = no change/staining - Grade 1 = severe change/staining - Use half-grades like 4–5 if needed.

5. Record the Result - Note the grade in your test report as per the test method (e.g., ISO 105).
6. Store Properly - Keep the gray scale away from light and moisture to avoid fading.
7. Features :
   1. Dual Type Availability - Comes in two types: for Color Change and for Staining.
   2. 5-Point Grading System - Grades from 1 (poor) to 5 (excellent), with half-step intervals like 4–5, 3–4.
   3. Standardized Grey Chips - Includes contrasting grey color pairs to match fabric changes accurately.
   4. Compact Design - Small, portable card or booklet format for easy lab and field use.

  Categories:

1. Gray Scale for Color Change - Used to evaluate the degree of color fading or change in a fabric after testing (e.g., washing, light exposure). - Assesses how much the original color has altered.
2. Gray Scale for Staining - Used to assess the degree of color transfer from a dyed fabric to an adjacent white fabric during testing (e.g., rubbing, washing).

- Evaluates staining on undyed fabrics.   These two types are essential tools in color fastness testing across textile labs. Want to know which standard tests use each type?