The importance of the surface hardness test for painting

The use of the surface hardness test according to Wilborn-Wolff is essential to guarantee high quality painting on metal pieces. Let's find out more about this fundamental tool for evaluating the hardness of coatings.

Painting is a delicate and complex process, which requires the use of specific techniques and tools to guarantee the highest quality of the work carried out. One of the fundamental tools for evaluating paintwork is the surface hardness test according to Wilborn-Wolff.

What is the purpose of the surface hardness test for painting?

The surface hardness test according to Wilborn-Wolff, also called scratch resistance test, is a method used to evaluate the hardness of the painted surface of metal pieces. The test is performed using the hardness of a pencil.

Pencil leads, which have a well-classified hardness and ranging from 6B to 9H (a set of 17 pencils), act as a "thermometer" for the resistance of the coating.

The surface hardness test according to Wilborn-Wolff is fundamental to guarantee the quality of the painting of metal pieces. In fact, a paint that is too soft or too hard can cause adhesion or scratch resistance problems.

The pencil is inserted into a special instrument, simply called a scratchability test device according to Wolff-Wilborn, which places them in a position with an inclination of 45°; at this point, the pencil is pressed onto the coating with a force slightly less than that necessary to break it. Hardness and scratch resistance will then be indicated by the type of lead that will not damage the tested surface.

Thanks to the surface hardness test, it is possible to evaluate the hardness of the paint and guarantee the maximum quality of the work carried out. The standard that regulates it is UNI EN ISO 15184:2020.

The importance of an internal laboratory

Our internal laboratory is equipped with cutting-edge instruments, including what is necessary to perform the surface hardness test according to Wilborn-Wolff.

Thanks to the use of dedicated tools and the experience of our staff, we are able to guarantee high quality painting, with optimal surface hardness for each type of item.

Our company is constantly committed to improving the quality of the work carried out, using the best technologies and tools available on the market. The surface hardness test according to Wilborn-Wolff is just one of the various tests we use to guarantee the highest quality of the painting of the pieces.

Our goal is to best satisfy the customer's needs, offering a personalized and tailor-made service.

Conclusions

The surface hardness test according to Wilborn-Wolff is a fundamental method for evaluating paintwork. Relying on a third-party painting supplier equipped with cutting-edge tools to carry out the surface hardness test means choosing a reliable and competent partner, capable of guaranteeing the highest quality of the work carried out.

Painting processes require great attention to detail and the use of specific tools to guarantee the highest quality of the work carried out. Contact us to find out more about our third-party painting services and related tests.