How to perform Cross Cut Adhesion test for painting. Demo video.

This is a tutorial video on how to perform a Cross-cut test for Painting.

In the paint and coating industries, paint adhesion testing is often used to determine if the paint or coating will adhere properly to the substrates to which they are applied. There are several different tests to measure the resistance of paints and coatings from substrates: cross-cut test, scrape adhesion, pull-off test, and others.
The cross-cut test is a method for determining the resistance of paints and coatings to separation from substrates by utilizing a tool to cut a right-angle lattice pattern into the coating, penetrating all the way to the substrate.

A quick pass/fail test can be accomplished through this method. When testing a multi-coat system, determination of the resistance to separation of different layers from one another can be accomplished.

There are two methods described in the ASTM Specification.

Test Method A
An X-cut is made through the film with a carbide tip tool to the substrate. Pressure-sensitive tape is applied over the cut. Tape is smoothed into place by using a pencil eraser over the area of the incisions. Tape is removed by pulling it off rapidly back over itself as close to an angle of 180°. Adhesion is assessed on a 0 to 5 scale.

[0- Greater than 65% area removed & 5 is 0% area removed]

Test Method B
A crosshatch pattern is made through the film to the substrate. Detached flakes of coating are removed by brushing with a soft brush. Pressure-sensitive tape is applied over the crosshatch cut. Tape is smoothed into place by using a pencil eraser over the area of the incisions. Tape is removed by pulling it off rapidly back over itself as close to an angle of 180°. Adhesion is assessed on a 0 to 5 scale. [0- Greater than 65% area removed & 5 is 0% area removed]

Keywords

CrossCut test.
CrossCut test for painting.
‎Scrape Adhesion Test.
‎Pull-off test.
Cross-Hatch.
CrossCut.
Testing for Paint Adhesion with BYK Cross Cut.
ISO 2409:2013(en), Paints and varnishes — Cross-cut test.
cross-cut test iso 2409
crosshatch adhesion test ASTM d3359