Color fastness to seawater test methods and standards


Release time:

2018-12-22

Purpose: This standard specifies the test methods of color fastness to seawater for all kinds of dyed, printed or other colored textiles. The seawater used here is artificially prepared seawater. Natural seawater is generally not used because of its volatile and unstable composition.

1.Purpose and scope of application

1.1 Purpose: This standard specifies the test methods of color fastness to seawater for all kinds of dyed, printed or other colored textiles. The seawater used here is artificially prepared seawater. Natural seawater is generally not used because of its volatile and unstable composition.

2. Principle

2.1 The specimen with multi-fiber cloth is immersed in artificial seawater at a specified temperature for a specified period of time, then placed between two glass or plastic plates and kept under a specified pressure and temperature for a certain period of time. After drying, the color change of the specimen and the staining condition of the multifiber cloth are evaluated.

3. Equipment and Materials

3.1 Color fastness to perspiration tester

It consists of a pair of stainless steel frame. The pressure of the hammer is 8.0Lbf, and the total pressure with the cover plate is 10.0Lbf; 21 resin (or glass) plates are included.

3.2 High-precision oven

3.3 Multi-fiber lining fabric No.1 or No.10

3.4 AATCC color-changing gray card and staining gray card

3.5 Small rolling mill

3.6 Test solution (artificial sea water)

4. Preparation of test solution (artificial seawater)

Sodium **chemide (NaCL) for technical use, 30g.

Dehydrated magnesium carbonate (MgCL), 5 grams.

Add sodium ***ide and magnesium ***ide to deionized or distilled water, dilute to one liter, and stir to dissolve.

5. Sample Preparation

5.1 Combined sample size: 60X60mm±2mm.

5.2 Multi-fiber lining fabric: No.1 or No.10 (including vinyl fiber, cotton, nylon, polyester, acrylic and wool, each fiber strip width of 8mm).

5.3 Sewing of the sample: No.10 wool fiber strip on the right side of the test sample and sewed to it.

6. Test Procedure

6.1 Place the test specimen in a petri dish and add the prepared artificial seawater. Wet the test specimen thoroughly at room temperature for about 15 minutes.

6.2 Remove the test specimen from the test solution. The wet weight of the specimen should be 2.5 to 3.0 times the dry weight. If it is more than 3 times the dry weight, it is necessary to remove the excess water by passing it through a small rolling mill.

6.3 Place the assembled specimen evenly between the resin sheets and place it in the sweat tester rack and apply 4.5Kg (10.0 lb) of pressure.

6.4 After fixing the clamps, remove the weights and place the assembled unit in an oven at 38±1°C for 18 hours.

6.5 Remove the combination specimen and dry separately at room temperature.

7. Grading

7.1 After drying, evaluate the color change of the specimen with the color change gray card under the artificial daylight of the rating light box.

7.2 When grading, the incident light and the surface of the specimen at an angle of about 45 degrees, the grader's line of sight and the surface of the specimen at an angle of about 90 degrees.

7.3 Evaluate the color change of the multifiber fabric with the color staining gray card.

8. Test Report

8.1 Standard number used, including year.

8.2 The number of color change of the specimen.

8.3 Staining level of multifiber fabrics.