Test the Resistance of Coating to Separation with Cross Hatch Tester

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In Paint & Plating industries, the Paint adhesion test is the most common and widely used test procedure that helps to determine whether the paint or coating of the material adheres to the substrate to which they are applied or to test the adhesion strength of the coating to substrate. This is performed using a test procedure known as Cross Hatch test.

Cross Hatch test also known as the cross-cut test is a method which is used to determine the resistance of the coated materials to separation by utilizing a cross hatch cutting tool known as Cross Hatch tester. The tool helps to cut a right angle lattice pattern onto the coating and penetrates the substrates from all the directions. A very quick pass/fail test can be accomplished through this method. On the other hand, if it is required to test a multi-coated pattern, some test methods need to be followed as prescribed by ASTM standard.

There are two test methods that are suggested by ASTM international standard organization:

  • Test Method A – as per this method, X- cut is made using the Cross Hatch Tester and a pressure sensitive tape is applied over it. After that, the tape is pressed using the palm or an eraser over the area. After that tape is pulled out rapidly in the backward direction as close to an angle of 180 degree. After that, the sample is examined visually, and adhesion is measured on 0 to 5 measuring scale.
  • Test Method B – This method is not applied if the applied coating is thicker than 5 mils. A cross hatch pattern is made through the tool on the substrate and flakes of the coating are removed using a soft brush. Now pressure sensitive tape is applied over it. After that, the tape is pressed using the palm or an eraser over the area. After that tape is pulled out rapidly in the backward direction as close to an angle of 180 degree. After that, the sample is examined visually, and adhesion is measured on 0 to 5 measuring scale.

Presto Stantest offers high-quality of cutting tool i.e. Cross Hatch Cutter that helps to determine the adhesion resistances strength of coating to separation. The instrument comprises of 2 or 3 blades. The instrument is quite easy to operate. The size of the blades can be chosen as per the coating thickness on the material. The instrument is designed for the observation of skilled professionals as per the standards ASTM D 3359, DIN EN 2409: 2013-6, BS EN 2409: 2013, ISO 2409: 2013.

For more information, contact our technocrats.