Here you can find an overview of all categories. Further, our precise measuring instruments and test equipment are also sorted by category.
Abrasion resistance is the ability to withstand the frictional forces attempting to remove the surface material.
Constant and defined film thicknesses is a precondition for testing and analysis of coating materials and coatings. Many properties of these materials depend on the film thickness.
Flexibility / elongation is the pliability or rigidity of a material. It expresses the extent to which it resists bending. There are several empirical test procedures for assessing the resistance of a coating of paint, varnish or related product to cracking and/or detachment from a metal or plastic substrate. For example, there is the bend test or the impact test.
The visibility of road markings is a crucial factor in ensuring traffic safety. Hence it is inevitable that road markings are checked, maintained and if necessary replaced on a regular basis.
The term colour fastness refers to two resistance criteria of a colour of a test sample. The first criterion is the resistance of a material to change in any of its colour characteristics. The second criterion is the resistance of its colourant(s) to adjacent materials as a result of exposure of the material to any environment that might be encountered during the use of the material. The first resistance criterion is checked by the “rubbing fastness” test. The term “rubbing fastness” is the term for the hue change of the test sample through rubbing. This test is evaluated visually with a comparative scale. Most common is the use of a “gray scale for staining”. “Crocking” and “smudging” are both equivalent terms for the transfer of colorant(s) from the test surface to another surface or to an adjacent area by rubbing. Therefore, if the second resistance criteria is checked, you test the crock resistance (equally called smudge resistance).
The cross-cut test is a very rapid and simple method for the assessment of single and multi-coat systems. Here, cuts in a 30° angle (method A) or right-angle (method B) are executed so that you receive a lattice pattern or an X-shape. These test methods can be used as quick pass/fail tests. When applied to a multi-coat system, assessment of the adhesion of individual layers of the coating among each other may be carried out.
Gloss is an optical property of a surface, characterized by its ability to reflect light. If a light beam strikes a surface – e.g. a lacquer – with a certain angle of incidence (ε), most of it will penetrate the layer of paint, the rest will be reflected.
This test is valid for flat road markings and road markings with low degree of texture. Road markings with high degree of texture or structured markings may not be suitable for measurement of skid resistance by this method.
The adhesion of a coating on a substrate is crucial for the mechanical performance as well as for the corrosion protection. In practice, there are several test procedures for determining the adhesion such as cross-cut test or bend test.
Many standards describe corrosion tests where a coating has to be prepared with scratch marks that penetrate it completely down to the metal substrate. Possible instruments are scratching tools according to Sikkens or Clemen and Cross-cut testers.
Resistance to solvents
When testing the solvent resistance of a surface it is checked how much of the coating remains after a defined number of double strokes.
The fineness of grind is particularly important during the manufacture of pigmented products. By its determination the efficiency of dispersion processes can be followed, and the performance of dispersion apparatuses and methods can be determined.
The visibility is an important factor for many road signs, road markings, traffic signs, road studs as well as high-visibility material such as warning clothes and Heavy good vehicles (HGV’s) contour safety marking.
Friction resistance is a measure of the resistance of a test material to defined frictional movements that attempt to remove the surface material.
Retroreflection / Retroreflectivity
The visibility is an important factor for road markings, traffic signs, road studs as well as high-visibility material such as warning clothes and Heavy good vehicles (HGV’s) contour safety marking.
For cost and quality reasons the determination of both, the wet and dry thickness has become more important during the last years.
Zehntner develops their own software for meeting and exceeding customer requirements.
The day visibility is a method to assess road markings. It measures the luminance coefficient under diffuse illumination (day visibility) of road markings. The observation angle of 2,29° corresponds to the viewing distance of a vehicle driver of 30 m under normal conditions. The illumination must be diffused light.
At the washability / cleanability test procedure you check if a coating can be cleaned with a standardized procedure without removing more than a defined film thickness after a defined soiling.
Hardness testing is an easy and fast method to determine the force needed to scratch a surface. The hardness degree of a surface is jointly responsible for the scratch hardness especially when scratching of sharp-edged articles or materials.