Regular checks should focus on the rubbing head, specimen holder, abrasive cloth or sandpaper, stroke counter, and the motion path of the tester. For dry and wet crocking work, it is also smart to inspect the cloth path, fasteners, and power connection so the rubbing action stays consistent from test to test.

The most important things to watch are wear, looseness, residue buildup from previous tests, and any change in smooth movement. After wet rubbing work, many labs also pay close attention to cleaning and drying the contact area so carryover does not affect the next color fastness result. The exact check routine usually depends on how often the unit runs, the specimen type, and your lab’s internal method controls.

To confirm the best maintenance approach for your lab, learn more about the system or request a quote so the setup can be matched to your testing method, sample mix, and daily workload.