Iso 85023 Dust Level Chart Pdf Updated -

To execute a compliant test, standard kits like the or the DeFelsko PosiTest DT are used.

Her phone buzzed. It was Jan, the lab manager.

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 85023 dust level chart pdf updated

A 7x or 10x magnifier (with a graticule) to evaluate particle sizes.

The quantity rating determines the percentage of the tape surface covered by dust. The scale ranges from clear to heavily contaminated: No dust visible under 10x magnification. To execute a compliant test, standard kits like

The International Organization for Standardization addresses this specific threat through .

Dust on a prepared surface acts as a bond-breaker between the primer and the steel substrate. It can also absorb moisture, leading to osmotic blistering under the paint film. The ISO 8502-3 standard standardizes how inspectors sample, visually evaluate, and record dust contamination before any coating application begins. The Pressure-Sensitive Tape Test Method Dust volume alone does not present the full picture

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ISO 8502-3 describes a practical, on-site method to evaluate the quantity and size of dust particles remaining on steel surfaces after cleaning (e.g., blast cleaning) and before painting.

Maintain relative humidity below 85% and ensure the substrate temperature is at least 3°C above the dew point to prevent moisture from trapping dust onto the steel profile.

The industry standard for assessing this contamination is ("Preparation of steel substrates before application of paints and related products - Tests for the assessment of surface cleanliness - Part 3: Assessment of dust on steel surfaces prepared for painting (pressure-sensitive tape method)"). This guide provides a detailed breakdown of the standard, how to use the ISO 8502-3 dust level chart , and where to find the updated PDF resources for 2026. What is the ISO 8502-3 Standard?