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ZAA2600 - Manual
8 Crockmeter tests
8.1 Introduction
CROCK TESTING is an internationally recognized test method to simulate the rubbing
action generated by a human finger and forearm. Crock testing is used to evaluate the
amount of color transferred from surfaces on a specific to other surfaces by rubbing.
Crock Testing methods are used to determine various surface parameters, such as
Color fastness to rubbing (e.g. of textile material): refers to resistance criteria of a colour of a
test sample against rubbing with another material. These criteria are resistance to change of
colour characteristics and resistance of its colorants to adjacent material (transfer).
Abrasion resistance is the ability to withstand the frictional forces attempting to remove the
surface material.
Resistance of solvents refers to a test method which compares amount of coating, which
remains after a predefined number of rubbing strokes with a solvent applied on the material.
For Crock testing Proceq offers the model ZAA2600.C Automatic Crockmeter and the
ZAA2600.SW Automatic Scrub Tester. The ZAA2600. can be used for Crock testing on test
samples with a maximum thickness of 72mm. The ZAA2600.SW however can only be used
for samples with a thickness of up to 15mm.
8.2 Friction finger and weight selection
As there are a wide field of materials and abrasion tests, which can be performed with a
Crockmeter, there are international standards which describe the procedures and the
material.
In order to carry out Crockmeter tests, at least
friction finger set and
weight are required
and an abrasive material
is required.
Please find below an overview of the equipment and accessories for the execution of a
Crockmeter test according to the most common standards
AATCC Test method 8-2007 - Testing the colorfastness to crocking of textiles
23. September 2021
ACC1344 Friction Finger Set B with a diameter of 16mm (0.63")
ACC1346 Weight for test force 9N
ACC1353 Cotton Rubbing Cloth
AATCC Gray Scale or AATCC Chromatic Transference Scale as
well as white AATCC Blotting Paper (can be ordered at
www.aatcc.org)
© Copyright 2021, PROCEQ SA
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