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Testing in Accordance with ISO 2409:
1. Use the table below to select the appropriate cutting tool based on
the thickness of the coating to be tested.
Coating Thickness
µm
mils
0 - 60
0 - 2.3
61 - 120
2.4 - 4.7
121 - 250
4.7 - 9.8
* For soft substrates (e.g. wood and plaster), use 2mm / 6 Teeth for
coating thicknesses between 0 - 120 µm (0 - 4.7 mils)
2. Inspect the tool to ensure that the cutting edge of the blade is not
damaged or dulled. If the blade is not in suitable condition, follow
the steps in Preparing the PosiTest CH (pg. 2).
3. With the test panel on a rigid, flat surface, place the PosiTest CH
on the coated surface with the blade perpendicular to the coating,
and pull the tool across the surface to create a mark or scratch
significantly longer than the width of the cutting tool.
4. Repeat step 3, producing another set of cuts at a 90° angle to the
first set of cuts, creating a lattice pattern on the surface.
NOTE:
All cuts shall mark or scratch the substrate or the test is con-
sidered invalid and should be repeated on a fresh test panel.
Specified
(Spacing/# of Cuts)
Cutting Tool
1 mm / 6 Teeth*
2 mm / 6 Teeth
3 mm / 6 Teeth
Step 3
PosiTest CH Cross
Hatch Adhesion
Tester Kit
CHKITISO6X1
CHKITISO6X2
CHKITISO6X3
3
Replacement
Blades
CHBLADE6X1
CHBLADE6X2
CHBLADE6X3
Step 4
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