Evaluation of the Chalking Rate of ASTM D4214 Exterior Paint Films

EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of ASTM D4214 testing. The purpose of ASTM D4214 is to characterize the chalking degree of an exterior paint using a reference standard or reflectance measurements.

In other words, this method compares the amount of residue collected on the surface of the sample by a fingertip or a cloth with the photographic reference standards available in this application to fulfill its meaning.

This standard describes four procedures that can characterize this property. Method A consists of comparing the amount of chalk collected on the fabric used to hit the sample with moderate pressure against one of the visual standards provided by this application.

Method B consists of assessing the amount of residue collected on a damp fingertip with a grading or numbered scale.

Method C relies on the use of a reflectometer to evaluate this property. More specifically, it uses ten tapes of masking tape to collect the chalk present on the sample and then uses the reflectance range of the tape strips as a means to correlate a chalk rating to the sample.

Method D uses the adhesive portion of a tape as a means to collect the chalk on the surface of the sample and then compares the whiteness of the recovered residue on the tape with the photographic reference under diffused light and on a black velvet. provided by this method. Finally, regardless of the test procedure used, Method D uses the adhesive portion of a tape as a means to collect the chalk on the surface of the sample and then compares the whiteness of the recovered residue on the tape to the photographic reference, under diffused light and on a black velvet.

Finally, regardless of the test procedure used, this method is a Method D that uses the adhesive section of a tape as a means to collect the chalk found on the surface of the sample and then, under diffused light and on a black velvet, compare the whiteness of the recovered residue on the tape with photographic reference. compares. provided by this method. Finally, regardless of the testing procedure used, this method is accelerated aging testing as a way to evaluate the stability of a paint over time.

EUROLAB assists manufacturers with ASTM D4214 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.