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ZAA2600 - Manual
For the selection of the appropriate gap height please also consider that the dry film
thickness can be less than the wet film thickness. This is depending on the weight content of
solids.
Various applicators with variable an fix gap heights are available as accessories.
2.3 Film Testing
The ZAA 2600 is an automatic linear abrasion tester with touchscreen and stepless
adjustable stroke length for reproducible abrasion testing.
2.3.1 Crock Testing
Crock testing 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
Colour 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 colourants 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.
2.3.2 Scrub Testing
Scrub resistance is the ability of a dried paint film to resist wearing or degradation.
A scrub tester is used to generate a repeatable abrasion on the device under test. The
degree of wear or degradation can then be visually assessed. Alternatively the weight loss of
the device under test can be determined.
ASTM test methods governing scrub resistance testing define the scrubbing with a nylon
brush or cloth for a set number of cycles of washing/cleaning when using a nonabrasive or
abrasive cleaning media as outlined in the methods, or another cleaner specified by the end
user; i.e., common household cleaners.
23. September 2021
© Copyright 2021, PROCEQ SA
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