[Strip Tape] ➔ [Discard 3 Turns] ➔ [Apply 200mm Strip] ➔ [Roll/Press 3x] ➔ [Transfer to Chart] ➔ [Grade 1-5] Required Equipment
, it is currently active and set for its next review cycle ending in February 2026 Updated ISO 8502-3 Dust Rating Chart The standard provides pictorial ratings for and descriptive classes for Quantity Rating Description of Dust Level Typical Action No particles visible under 10x magnification Very slight; particles visible under 10x but not naked eye Slight; particles just visible with normal vision Pass (Typical spec) Moderate; particles clearly visible (~0.5mm) Often Fail / Re-clean Heavy; particles between 0.5mm and 2.5mm Fail / Re-clean Very Heavy; particles larger than 2.5mm Fail / Re-clean Rösler Blog Key Procedure Steps
Inspectors must also classify the physical size of the dust particles using an illuminated hand lens with 10x magnification. Description Particle Size Dimension Particles not visible Under 50 µm in diameter Class 1 Small particles Visible only under 10x magnification (50 µm to 100 µm) Class 2 Medium particles
To execute a compliant test, standard kits like the or the DeFelsko PosiTest DT are used. iso 85023 dust level chart pdf updated
The international gold standard for assessing this invisible threat is (Pressure-Sensitive Tape Method). 1. Understanding ISO 8502-3
Note: If the tape displays an overall uniform discoloration (reddish-brown from garnet/grit or black from slag), it is automatically classified as . This microscopic dust can cause severe paint delamination. 2. Dust Particle Size Classes (0 to 5)
Ready-to-print field data sheets to record location, tape batch, inspector name, quantity rating, and size class. [Strip Tape] ➔ [Discard 3 Turns] ➔ [Apply
The test uses a specific pressure-sensitive adhesive tape that is pressed onto the steel and then transferred to a display card for comparison against a visual rating scale. The 5 Levels of Dust Quantity
I searched for the specific document but could not find a standalone, officially updated PDF chart released separately by ISO.
The chart provides a pictorial reference for the "Pressure-Sensitive Tape Method." Inspectors apply a specialized adhesive tape to a prepared steel surface, remove it, and then compare the captured dust against the chart to determine: iTeh Standards Dust Quantity Rating The Mechanics of the "Tape Test"
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ISO 8502-3 standard is a critical benchmark in industrial coating, specifically designed to assess residual dust on cleaned steel surfaces before painting. Even after rigorous abrasive blasting, microscopic dust particles can remain, acting as a barrier that prevents proper paint adhesion and traps moisture, which leads to premature corrosion, peeling, and flaking. The Mechanics of the "Tape Test"