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Crockmeter For Testing Lab Workshop.
Crockmeter - For Testing Lab
One of the tests for determination of colorfastness of piled fabrics and
floor coverings 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 rectangular-shaped
brass crock block of specified dimensions rubs against the test
specimens under a fixed load. The amount of colour lost by the test
specimen and the amount of color transferred to a piece of abradant
fabric fixed over the base of the crock block are graded with the help
of standard grey scales to evaluate the color fastness of the sample
under test against rubbing.
The Crockmeter
(motor operated) consists of a rigid flat metallic platform on which
the test specimen can be held firmly and an abrading crock block 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 two flat plates holding it at its ends.
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