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ISO 8502-3 dust assessment is widely used across industries where coating performance is critical:
There has been some confusion regarding updates to this standard. iso 85023 dust level chart pdf updated
In the world of industrial coating and surface preparation, cleanliness is not just about removing rust or old paint. One of the most overlooked yet critical contaminants is —microscopic dust particles that cling to a steel surface after blasting.
Structural Steel FAQ, Part 4 – Evaluating the Presence of Dust - Rösler I can provide specific troubleshooting steps or document
| | Description | Particle Size | | :--- | :--- | :--- | | 0 | Particles not visible, even under 10x magnification | < 50µm (very fine) | | 1 | Visible under 10x magnification only, not to the naked eye | < 50µm (fine) | | 2 | Just visible to the naked eye (with normal/corrected vision) | 50 – 100µm | | 3 | Clearly visible to the naked eye | < 0.5mm | | 4 | Moderately sized particles | 0.5 – 2.5mm | | 5 | Large particles | > 2.5mm |
Particles are classified by their diameter using a 10x magnifier: Description Typical Diameter No particles visible Visible under 10x magnification (not visible to naked eye) Just visible with normal vision Clearly visible with normal vision Clearly visible Clearly visible Assessment Procedure Preparation One of the most overlooked yet critical contaminants
Direct you to suppliers for the Elcometer 142 Dust Assessment Plate.
I hope this guide serves as a valuable resource for understanding and using the ISO 8502-3 dust level chart. The key takeaway is that the current, authoritative version is , confirmed in 2022, and the practical tool you need is the commercial comparator chart available from test equipment suppliers.
Instead, professional inspectors utilize verified field kits from established coating instrument manufacturers. Dust Test After Blast Cleaning IOGS Official Video
When looking for the "Dust Level Chart PDF," you are looking for the visual grading system defined in the standard. The chart consists of photographs or drawings of tape strips with varying amounts of dust.