: Peel the tape carefully off the substrate and mount it onto the contrasting background squares of an official Dust Assessment Plate or Comparator Chart . Analyze and Record : Use your
A: It is designed primarily for blast-cleaned steel (corresponding to rust grades A, B, or C).
The standard classifies the size of the dust particles using letters: iso 85023 dust level chart pdf updated
Download your official ISO 8502-3 dust level chart PDF updated today, and pair it with a calibrated 10x reticle magnifier for true field accuracy.
Industrial inspectors often use standardized reporting templates to document these results. You can find current resources and PDF examples on platforms like (e.g., ISO 8502-3 Dust Level Chart PDF ) or via official standards bodies like the ISO Store for the ISO 8502-3:2017 full document. INTERNATIONAL STANDARD ISO 8502-3 : Peel the tape carefully off the substrate
Pull out and throw away the first three turns of the pressure-sensitive adhesive tape to eliminate any shelf contamination.
Moderate dust concentration evenly distributed across the tape area. Marginally Acceptable (May require re-cleaning) leading to localized blistering
Because ISO standards are copyrighted intellectual property, the official, fully updated ISO 8502-3 document and its visual comparison charts must be acquired through authorized channels:
Dust on a prepared surface acts as a bond-breaker. It prevents the liquid paint from wetting out the steel substrate properly, leading to localized blistering, delamination, and osmotic bubbling under the coating film. The Scope of the Standard
ISO 8502-3:2017, Table 1
Particles just visible with normal vision (50 µm to 100 µm). Class 3: Clearly visible particles (100 µm to 500 µm). Class 4: Large particles (0.5 mm to 2.5 mm). Class 5: Very large particles (greater than 2.5 mm). Why You Need an Updated PDF Chart