The Crockmeter also named rubbing fastness tester, is widely used to determine the amount of color transferred from the surface of colored textile materials or other dyed materials to another surface by rubbing. Moreover, the Crockmeter rubbing fastness tester can apply to textiles made from all fibers in the form of yarn or fabric whether they are in the process of dyeing, printing, or coloring. However, it is unwise to use the Crockmeter for carpets or for prints. Because their singling out of areas may be too small to apply this method. Most importantly, we need to carry out the Crockmeter test before or after some treatments, such as washing, dry cleaning, washing, dry cleaning, shrinkage, ironing, finishing, and other processes about textiles. Otherwise, they may affect the degree of color transfer from a material, making it poor.
Besides, the Crockmeter is equipped with an electronic counter with a handle set on the top to take it easy. And it has a piece of sandpaper set under the test sample. Therefore, it is possible to fix the sample during the test, making the rubbing Color Fastness test repeatable. With the aid of a stable slide, the instrument can offer you even and precise testing results. In addition, the weight which produces 9N loading is changeable to alternative weights.
TESTEX provides two types of Crockmeter. One is the electronic Crockmeter and the other is the manual Crockmeter. The electronic one also has a pre-determined electronic counter fitted for strokes up to 999,999 times. However, If you want to conduct rubbing fastness testing fewer times, you are accessible to a manual Crockmeter as an alternative to this motorized one.
Except for the rubbing fastness tester, other color fastness equipment including the washing fastness tester, and light fastness tester, can check on this page by clicking here.
Features of Crockmeter
precision slide rail
Advantageous test sets
Bigger size specimen
Meet strict standards
easy to change Handle portable
prolonging the service life
Specifications of Crockmeter
|Type of Crockmeter||TF411 Electronic Crockmeter||TF410 Manual Crockmeter|
|Rubbing head||16 mm ||16 mm|
|Vertical pressure||9N+/-10%||9N ± 10% |
|Rubbing stroke||104 ± 3 mm||104 mm |
|Counter||1 ~ 999,999 times, automatically stop||/|
|Net Weight||11 kg||/ |
|Dimensions||170 mm * 650 mm * 330 mm||160 mm * 660 mm * 215 mm |
|Power||220/110 V 50/60 Hz 3 A||/|
|Standards||ISO 105x12, ISO 20433, AATCC 8, GB 13920 ||ISO 105x12, ISO 105xD02, AATCC 8, AATCC 165|
|Optional Standards||ISO105xD02, AATCC165||/|
- AATCC rubbing clothing 1 box
- Sandpaper 2 (Pcs)
- Rings 2 (Pcs)
- AATCC/ISO rubbing cloth
- AATCC/ISO grey card
- Rectangular test heads and clamping rings
- Round clamping rings
The significance of the color fastness resistance
As we can see, it is easy for the color of one piece of cloth to change and transfer to another cloth in the process of manufacturing, wearing, storage, etc., due to the rubbing. What is worst, wearing cloth with poor color fastness, not only will stain other light-colored clothing, affecting the beauty but also surface dyes will be easily transferred to the skin due to the rubbing. As a result, the skin will absorb the dye, causing allergies to the skin, or doing harm to the human body to some extent. Therefore, it is of great importance to test the color fastness resistance and improve it.
Welcome toTESTEX – a professional textile testing instrument supplier – Crockmeter TF410/TF411 is on sale, contact us to get a detailed price quote.
Dyeing color fastness: the resistance to transferring the color or stained color to other materials. And the color fading or the transfer may occur during the processing, testing, storage, or usage.
Friction Decolorization: The transfer of color from one material to another material by rubbing.
This method is used to measure the degree of color transfer from colored textile surfaces to other textile surfaces under the effect of friction. It applies to dyed fibers, printed fabrics, or other colored yarns or fabrics. The dry and wet white cotton cloth is used as a friction medium.
Crocking Cloth: This is a white unbleached, undyed cotton lawn material
Fabric to be Tested: The sample need not be cut to any specific size as long as an increased portion covers the metallic mounting plate.
Two specimens are required for dry testing and two for wet testing.
The two specimens for each must be such that one is assessed with the long direction parallel to the warp and another parallel to the weft. The wet test must be made with fresh dry samples and crocking cloths which have been wetted with water and squeezed to 100% take up (i.e. 10 grams of fabric is increased to 20 gm's of fabric plus water).
1 Hang the Loading Piece on the Hang Pin. Mount one piece of crocking cloth onto the Rubbing Finger using the clip provided.
2 Mount the specimen on the base plate. Press the button on the counter to clear the counter to zero. Start the test by shaking the handle clockwise.
3 Take out the white cotton cloth and compare it with the colored grey card or AATCC color card to evaluate the color degree of the white cotton cloth.
Textiles will often rub with other objects when they are used. Sometimes, they are rubbed in wet conditions and even stained with other objects if the dye fails to own good dye fastness. Therefore, there should be some specified requirements for the rubbing color fastness.
The rubbing color fastness refers to the resistance to color fading of fabrics in friction for a long time with each other or other objects to measure its impact on the fabric color fastness.
How to rate the sample?
1 The rating should be accurate to 0.1 level if multiple samples are measured.
2 The white clothes with three layers should be lined under the test cloth when rating.
3 A color transfer ruler or stained gray card should be prepared to evaluate the amount of color transfer to the rubbing cloth of the measurement sample
4 A stained gray card or a 9-step AATCC color transfer card can be used to evaluate the wet and dry rubbing fastness with
How to test the dry and wet friction fastness of fabric?
Fix the specimen on the friction head of the friction fastness test machine, so that the warp direction of the rubbing cloth is the same as the running direction of the friction head. In the length direction of the dry rubbing specimen, the machine is switched on with a reciprocating dynamic range of 100 mm and a vertical pressure of 9 N on the friction head, respectively detecting the longitudinal and latitudinal direction of the specimen. Specimen and friction cloth in the standard atmosphere to adjust the wet, the test should be carried out in the standard atmosphere.
Wet friction specimens must be wetted with tertiary water, removed, and placed on a dripping net to drip evenly, or squeezed using a liquid roller to achieve a water content of 95% to 105%. Other operations are essentially the same as dry friction testing. After the wet rubbing test, the wet rubbing cloth is left to dry at room temperature.
Indicate whether dry or wet friction and write out the evaluation results. Write down whether to use a stained gray card or a colored card in the rating process and describe the treatment of the sample.
1 The colour fastness to rubbing test should be carried out on the front side of the specimen. If any dyed fibres are brought out and left on the rubbing cloth, they must be removed with a brush.
2 The lining fabric should be stored in a sealed, light-proof, and dry place to avoid contamination, moisture, and yellowing.
3 Before testing, the rubbing surface of the friction head should be carefully checked to ensure that it is smooth and uneven.
4 The rubbing fabric should not be loosened when fixed to the friction head. After fixing, the rubbing head should be carefully placed on the specimen to avoid accidentally increasing the degree of staining.
If you want to know more, please contact us. As a professional supplier of textile instruments, we are committed to continually improving the user experience. TESTEX Textile Testing Equipment is a reliable choice for testing textile quality.
A: TF411 Crockmeter is electronic mode, and TF410 Crockmeter is manual mode. The Electronic Crockmeter is more labor-saving to use and easy to use. If you want for fewer times rubbing fastness tests, you could choose Manual AATCC Crockmeter.