ISO Gray C (ISO Gray Scale for Color Change)
$251.25 / Scale
A gray scale is used for visually evaluating the colorfastness of textiles. There are two types of gray scales. one for assessing color change and another for assessing staining. The Gray Scale is an essential tool for textile product developers and manufacturers, as it helps determine the suitability of fabrics for specific applications based on their colorfastness. The ISO Gray Scale for Color Change consists of nine pairs of colored chips, 5, 4-5, 4, 3-4, 3, 2-3, 2, 1- 2, and 1, which illustrate how much a fabric’s color changes due to external factors like washing and exposure to light as described in ISO 105-A02. The result of a colorfastness test is evaluated by visually comparing the difference in color between the original (un-tested) and the tested specimens with the differences represented by the gray scale number grading. The color change grade is equal to that of the gray scale pair that is judged to have the same color difference. Results are reported as a gray scale for color change grade of 5 to I, with 5 representing no color change and 1 representing the most color change. This tool helps manufacturers determine whether a fabric will maintain its color over time under various conditions.
Description
The ISO Gray Scale for Color Change is designed to visually evaluate the changes in color of textiles resulting from colorfastness tests. The scale consists of nine pairs of gray chips, which illustrate color differences and provide a corresponding fastness rating from 1 to 5, with 5 indicating excellent color retention and 1 indicating poor retention. The ISO gray scale measures color change. One half of each color chip pair is the same color as the untested specimen before colorfastness testing. The second half of the color chip ranges from th starting color (no loss of color) to light gray (loss of all color). The amount of contrast between the tested fabric and untested fabric is related to one of the pairs of gray color chips on the gray scale for color change.
General Information
| Construction | Paper / Printed scale |
| Approx Weight of each scale | 90g |
| Testing Standards | ISO |
| Test Methods | AATCC EP 11, ISO 105-A02, ISO 105-G03 |
| MOQ | 1 Piece |
| What is it used for | Visual Evaluation of color changes according to ISO 105-A02 Grey scale for assessing change in colour |
| ISO Test Methods that require the scale | ISO 105-B07 Colour fastness to light of textiles wetted with artificial perspiration ISO 105-C06: Colour fastness to domestic and commercial laundering ISO 105-C10: Colour fastness to washing with soap or soap and soda ISO 105-C12: Colour fastness to industrial laundering ISO 105-D01: Colour fastness to dry cleaning using perchloroethylene solvent ISO 105-P01: Colour fastness to dry heat (excluding pressing) ISO 105-P02: Colour fastness to pleating: Steam pleating ISO 105-E01 Colour fastness to Water ISO 105-E02 Colour fastness to Sea Water ISO 105-E03 Colour fastness to Chlorinated Water (Swimming Pool Water) ISO 105-E04 Colour fastness to Perspiration ISO 105-E07 Colour fastness to spotting: Water ISO 105-G01Colour fastness to nitrogen oxides ISO 105-G02 Colour fastness to burnt-gas fumes ISO 105-G03 Colour fastness to ozone in the atmosphere ISO 105-G04 Colour fastness to nitrogen oxides in the atmosphere at high humidities ISO 105-N01 Colour fastness to bleaching: Hypochlorite ISO 105-N02 Colour fastness to bleaching: Peroxide ISO 105-N03 Colour fastness to bleaching: Sodium chlorite (mild) ISO 105-N04 Colour fastness to bleaching: Sodium chlorite (severe) ISO 105-N05 Colour fastness to stoving ISO 105-P01 Colour fastness to Dry Heat (Excluding Pressing) ISO 105-P02 Colour fastness to Pleating: Steam Pleating ISO 105-X11 Colour fastness to hot pressing ISO 105-X12 Colour fastness to rubbing ISO 105-X16 Colour fastness to rubbing — Small areas |
How product is used across industries:
| QA Testing | Gray Scale for color change indicates the amount of fading or color alteration with environmental exposure or washing |
| Using the ISO Gray Scale for Color Change |
Prepare the Test: Place an original untested specimen and its corresponding tested specimen side by side, touch, and in the same plane and oriented in the same direction |
| Evaluation using gray scale | Compare the perceived visual differences between the original and tested specimens with the differences represented by the grey scale pairs. The grade is that of the grey scale pair whose color difference corresponds most closely to the color difference between the original and tested specimen. |
| Visual Assessment |
Assign Rating: Under standardized lighting conditions, visually determine which gray chip most closely matches the degree of color change on the test specimen. Record the rating corresponding to the matching gray chip as the change in color grade for the tested sample.
Numerical step ratings range from: |
| Proper Handling | Use gloves to prevent contamination of the gray scale chips. With regular use of the ISO Gray Scales, it is important to handle the product with care to extend the shelf life of the product. Extensive use of ISO Gray Scales causes the gray scales to get scuffed, scratched, and stained. Store the gray scale in its protective sleeve when not in use. Replace the gray scale annually to maintain accuracy. Ensure trained personnel perform the visual assessment and under consistent lighting to reduce subjectivity. |
