: Specifications for a job will often state a maximum allowable rating (e.g., "Quantity Rating 2, Size Class 2"). If the results exceed this, the surface must be cleaned again—usually with dry compressed air—and retested.
: Dust is visible under 10x magnification but not to the naked eye. iso 8502-3 dust level chart
The chart breaks dust into three particle size ranges: : Specifications for a job will often state
The ISO 8502-3 dust level chart provides a standardized way to assess surface cleanliness, ensuring: "Quantity Rating 2
For most high-performance coatings (epoxies, polyurethanes, linings):