Dust smaller than size 3 (< 0.05 mm) isn’t classified, yet submicron dust can still cause coating pinholes or poor adhesion.
You also rate dust quantity from 1 (very few) to 5 (dense coverage). The chart helps you compare what you see on adhesive tape (after pressing onto the surface) to reference pictures. iso 8502-3 dust level chart
– Indispensable for field dust assessment, but don’t rely on it alone. It answers “how big and how much?” but not “is it chemically harmful?” Use it as a screening tool, not a final verdict for high-stakes coatings. Dust smaller than size 3 (< 0
The ISO 8502-3 dust level chart is commonly used in various industries, such as: – Indispensable for field dust assessment, but don’t
: Dust is visible under 10x magnification but not to the naked eye.
Assessment: Place the tape on a contrast-colored card (white or black). Rating: Visually compare the dust quantity (1-5) and parti... LinkedIn Surface Dust Test After Sandblasting - Inspection 4 Industry The tape indicates a pattern of adhered dust to the surface and is compared with the pictorial figure provided on ISO 8502-3. The ... Inspection 4 Industry Show all Pros: Permanent Record: Tapes can be mounted on test record sheets or cards to provide a physical "snapshot" of the surface at the time of inspection. Cost-Effective: Requires minimal equipment—primarily specialized tape, a 10x magnifier, and the reference chart. Cons: Subjectivity: Because it's a visual comparison, two inspectors might disagree based on lighting, viewing angle, or background contrast. Execution Dependent: Pressure must be consistent. Some kits like the TQC Dust Test Kit offer a spring-loaded roller to standardize the pressure applied to the tape. Rösler Group +6 Expert Tip for Field Use Always discard the first 2-3 layers of the tape roll before testing to ensure you aren't using contaminated or aged adhesive. If the tape shows an overall fine discoloration (rather than distinct particles), it is typically recorded as
Understanding the ISO 8502-3 Dust Level Chart: A Guide to Surface Cleanliness