Ensure your PDF reference reflects the latest revisions regarding standard backcloth colors. Typically, a black background is used for light-colored dust (garnet, silica, aluminum oxide) and a white background for dark dust (coal slag, steel grit). Best Practices for Passing an ISO 8502-3 Inspection
Dust volume alone does not present the full picture. Large particles present a greater threat to thin-film coatings because they can bridge or protrude through the dry paint film. ISO 8502-3 divides dust particle sizes into six distinct classes: : Particles not visible under 10x magnification.
ISO 8502-3 Dust Tape Test — Dust Test After Blast Cleaning IOGS Official Video
The ISO 8502 series was updated in 2017, and the new standards bring some changes to the dust level classification. Here are the key updates: iso 85023 dust level chart pdf updated
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.
Always perform a high-pressure air blow-down after blasting. Ensure the compressed air used for blowing down is strictly oil-free and dry (compliant with ASTM D4285).
These particles, if left untreated, act as a wick for moisture absorption and destroy coating adhesion, leading to premature failure like osmotic blistering or delamination. Ensure your PDF reference reflects the latest revisions
Any tape recording a Quantity 3, 4, or 5 fails inspection. If a surface fails, it must be blown down with clean, dry compressed air or vacuumed, and re-tested from scratch. Downloadable & Physical Tooling Options
: Particles ranging from 0.5 mm to 1.0 mm in diameter.
You can download the ISO 8502-3:2017 PDF from the following sources: Large particles present a greater threat to thin-film
ISO 8502-3:2017 remains the most current and updated version of the standard for assessing dust on steel surfaces. While last reviewed and confirmed in
While the official, legally binding visual comparators must be purchased directly from the International Organization for Standardization (ISO) or authorized distributors (like Elcometer or TQC Sheen) to ensure absolute calibrated compliance, digital reference PDFs serve as an excellent training tool and field verification guide. What to Look For in an Updated PDF Guide: