Motorized Crock Meter

Description and Specification for Lab Tenders

Crock Meter (Motorized). 

Crock Meter (Motorized) - One of the tests for determination of color fastness of dyed leather is the crocking test. This test is used for the determination of colorfastness against rubbing, either under dry or under wet conditions.   In this test a moving brass finger of specified shape and size rubs against the test specimens under a fixed load. The amount of color transferred to a piece of abradant fabric fixed over the base of the moving finger is graded either against the amount of color transferred by a standard leather sample under identical conditions, or by visual rating of amount of color transferred during dry and wet rubbing.   The  Crockmeter (motorized model) consists of a rigid flat metallic platform on which the test specimen can be held firmly and an abrading finger that rubs against it under a specified load. The platform is fixed over the base of the equipment and lies in a horizontal plane. The test specimen is held firmly over an abrasive paper, which is pasted on the upper face of the platform, with the help of two pressing pins holding it at both ends.   The abrading finger has a flat circular rubbing face, which is covered with a piece of white rubbing fabric during the test. The rubbing fabric picks up color lost by the test specimen during rubbing. It is held over the finger with the help of a spiral spring. civil lab equipments manufacturers 

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