Colorfastness to rubbing or crocking is a basic testing procedure of a garments or fabric. After producing fabric it is badly need to take a test of crocking. Crocking is like rubbing a period of time with a minimum cycle. So here we are showing you how to do colorfastness to crocking. Colorfastness to rubbing or crocking is nothing but a combination of dry and wet rubbing test.
Steps of testing colorfastness to rubbing or crocking
There are basically two steps in colorfastness to rubbing or crocking. In basic procedure we generally follow the following steps
- Dry crocking test / Dry rubbing test
- Wet crocking test / Wet rubbing test.
Colorfastness to rubbing or crocking in dry / Dry rubbing test
Colorfastness to rubbing or crocking in dry fabric is the first steps of rubbing test. In textile manufacturing process it is called dry rubbing test. First one object (fabric or garments) should have to select which needs to test with crocking meter. Crock meter is a testing machine by which colorfastness to crocking is done. First a dry garment have to place according to the position. Then one pure cotton fabric swatch is place on the teeth of the crock machine. Then run machine about ten cycle and put out the white watch from the teeth of machine. See the dry rubbing effect of the swatch. It comes with some shade of fabric or garments that was placing for test. Now compare the shade with the grey scale and numbering the test comparing with grey scale. This is the procedure of colorfastness to crocking.
Colorfastness to rubbing or crocking in wet / Wet rubbing test
Colorfastness to crocking in wet fabric is the second steps of rubbing test. We call it as wet rubbing test also. First object has to place on the crocking machine. Crock meter is a machine. Then we wet the pure white watch and set it on the same position of teeth as we did for the dry rubbing test. Follow same procedure and finally will get the shade in wet form. Compare it with the grey scale and grade it according to the grey scale.