


Chiuvention Instruments
SmartCrock
SmartCrock Crockmeter tests the color fastness of textiles or leather to dry or wet rubbing. In the crock meter test, a standard white rubbing cloth is rubbed repeatedly against a sample at a certain speed. After the rub test, you can rate color fastness by comparing the color depth of the friction cloth with the standard grey card. They do this under a standard light.
The crock tester is fully automatic. It repeats rubbing. The rubbing head can lift up and down on its own. The fixture can hold dry and wet samples at once. The loading table can be shifted left and right. This makes it easy to quickly do the dry and wet rubbing color fastness test. It reduces the influence of manual operation on the test results. What’s more, it saves 20% of the test time and saves labor at the same time.
SmartCrock Crockmeter applies to ISO 105×12, GB/T 3920, AATCC 8, ISO 20433 Method C, and other standards, suitable for testing cotton, chemical fiber, blended and other colored fabrics and leather.





You can hold wet and dry specimens at the same time. The removable loading table lets you quickly switch between the textile’s friction zones. You can perform dry and wet friction tests quickly.
Noiseless and durable. Moving parts use linear guides. They make the instrument run smoothly and quietly. The main body of the sample table is made of durable aluminum alloy.
Crock Tester Standards
Standard
ISO 105×12 (round friction head), AATCC 8, GB/T 3920 (round friction head), ISO 20433 Method C;
Optional standard
ISO 105xD02, AATCC 165, ISO 105×12 (rectangular friction head), GB/T 3920 (rectangular friction head)
Specifications
Friction head diameter 16 mm
Vertical pressure 9N +/- 10%
Friction stroke 104 mm
Standard accessories
1. AATCC friction cloth
2. Sandpaper
3. Clamping sleeve
4. Sampling plate
Optional accessories and consumables
1. AATCC/ISO Friction Cloths
2. AATCC/ISO stained gray card
3. Sandpaper
4. Rectangular test head with clamping ring
5. Round clamping ring
Power: 220 / 110 V 50 / 60 Hz
Weight: 23Kg
Dimension: 663*173*250 mm (L*W*H)
Dry rubbing test: It is used to assess the color fastness of a material in a dry state, especially in dry rubbing situations that may be encountered in daily wear or use. This test reflects the abrasion resistance of a fabric in a moisture-free environment.
Wet rubbing test: Evaluates the color fastness of a material in a damp or wet condition, usually simulating actual use where it may come into contact with moisture (e.g. sweat, rain, etc.). The wet rubbing test is more revealing of the stability of dyes under humid conditions.
1. Following standardised test methods
Use of international standards: Tests are conducted following international standards such as ISO 105 X12, AATCC 8 and GB/T 3920. These standards provide detailed test procedures, environmental conditions, and equipment requirements to ensure consistent and comparable testing.
Clarify test conditions: Ensure that samples are humidified at the specified temperature (typically 20°C ± 2°C) and relative humidity (65% ± 2%) to ensure a stable test environment.
2. Equipment Calibration and Maintenance
Regular calibration of equipment: Colour fastness to friction test instruments should be calibrated regularly to ensure their measurement accuracy. Use samples of known color fastness level for verification to confirm the performance of the instrument.
Maintain the friction head: Keep the surface of the friction head flat and clean to avoid inaccurate test results caused by uneven friction head. Regularly check the wear and tear of the rubbing head and replace it in time.
3. Sample Preparation and Handling
Sample Selection: Select representative samples for testing and avoid using materials that are too old or damaged to ensure the reliability of the results.
Proper Sample Handling: Appropriate pre-treatment of samples, such as preheating and humidifying, is performed before testing to eliminate interference due to environmental changes.
4. Data Recording and Analysis
Detailed recording of results: Detailed records of each color fastness to rubbing test result, including sample number, test date, environmental conditions, etc., are kept for subsequent analysis and traceability.
5. Evaluation using grayscale cards
Evaluate the degree of color staining by comparison with standard grayscale cards to ensure an objective and consistent evaluation process. Use appropriate light source (e.g. D65 light source) for observation to minimize the influence of light changes on the results.