Significato e scopo

5.1 I graffiti su edifici e strutture sono un problema persistente e crescente. Many applications have been produced that are designed to resist graffiti marks or provide coatings on surfaces from which such marks can be easily removed. The procedure described in this practice provides a set of standard conditions that can be used to assess the graffiti resistance of a surface.

5.2 Graffiti resistance measured in accordance with this procedure is applicable to smooth surfaces. The same coating applied to rough or textured surfaces may be less resistant to graffiti.

5.3 Coating resistance to graffiti determined after natural or laboratory accelerated weathering, either before or after marking and conducted in accordance with this code, is considered to have greater weight than resistance to graffiti determined on the same coating without weathering. Coating resistance to graffiti determined after natural weathering should be considered more important than resistance to graffiti determined after accelerated laboratory aging.

ASTM D6578-2018 Pratica standard per la determinazione della resistenza ai graffiti

Ambito di applicazione

1.1 This protocol covers the basic methods for assessing the graffiti resistance of coatings and the use of this protocol to assess the graffiti resistance of coatings after outdoor or laboratory accelerated exposure (before or after graffiti). Graffiti resistance is based on how a defined set of cleaners removes a defined set of marks.

1.2 This specification also defines procedures (opzionale) for assessing graffiti removal after re-marking and subsequent re-cleaning. It does not involve recoating after the coating is no longer graffiti resistant.

1.3 Values expressed in SI units or inch-pound units shall be considered standards, rispettivamente. I valori specificati in ciascun sistema potrebbero non essere esattamente gli stessi; Perciò, ciascun sistema dovrebbe essere utilizzato in modo indipendente. Combining the values of both systems may lead to non-compliance with the criteria.

1.4 Questo standard non è destinato ad affrontare tutti i problemi di sicurezza, se presente, legati al suo utilizzo. È responsabilità degli utenti di questo standard stabilire una sicurezza adeguata, pratiche sanitarie e ambientali e per determinare l'applicabilità delle restrizioni normative prima dell'uso.

1.5 This international Standard has been developed in accordance with the internationally accepted standardization principles established in the Decision on Principles for the Development of International Standards, Guidelines and Recommendations issued by the Technical Barriers to Trade (TBT) Committee of the World Trade Organization.