ISO 8502-3 is a critical part of the ISO 8502 series, which focuses on tests for assessing surface cleanliness. Specifically, Part 3 describes the "pressure-sensitive tape method" for evaluating residual dust on steel surfaces that have been cleaned and prepared for painting. Dust contamination is a major threat to coating integrity—it acts as a weak boundary layer, preventing proper adhesion and leading to premature coating failure, such as flaking or blistering. By providing a standardized method for sampling and rating dust, ISO 8502-3 allows inspectors and contractors to make objective, pass/fail decisions about surface readiness, ensuring the performance of subsequent paint systems.
Based on the request for updated content regarding the , the following information summarizes the current standard, how the chart works, and where the PDF resources fit in.
: This is a pictorial rating representing the density of dust particles on the tape. Rating 0 : Surface is free of dust. iso 85023 dust level chart pdf updated
The quantity of dust is assessed by comparing the tape to a pictorial reference chart (0–5 scale): Tape is clear; no dust visible. Rating 1–4: Increasing concentrations of dust particles.
| Class | Description of Dust Particles | Particle Diameter | |-------|------------------------------|-------------------| | 0 | Particles not visible under ×10 magnification | Not detectable at 10× | | 1 | Particles visible under ×10 magnification but not with normal or corrected vision | < 50 µm | | 2 | Particles just visible with normal or corrected vision | 50–100 µm | | 3 | Particles clearly visible with normal or corrected vision | Up to 0.5 mm | | 4 | Particles clearly visible | 0.5–2.5 mm | | 5 | Particles clearly visible | > 2.5 mm | ISO 8502-3 is a critical part of the
A: The board is usually part of a dust tape test kit, available through manufacturers like Elcometer or Industrial Physics.
If you are looking for an for your latest project quality control plan, this comprehensive guide breaks down the standard, the visual assessment charts, inspection procedures, and the digital evolution of dust testing. What is ISO 8502-3? By providing a standardized method for sampling and
Low dust level; small but clearly defined particles are visible.
In addition to the quantity (Classes 0-5), the standard allows for the classification of particle size, typically described as: Not visible without magnification. Medium Particles: Visible to the eye, but small. Large Particles: Clearly visible. How to Perform the ISO 8502-3 Dust Test