Cut a piece of tape approximately 200 mm long, press it firmly onto the prepared steel surface, and use a standardized spring-loaded roller (like the Elcometer 145 ) to apply a uniform force between 39.2 N and 49.0 N.
⚠️ The official ISO 8502-3 chart is a copyrighted document. While summary PDFs are available from equipment manufacturers (like Elcometer or TQC Sheen), the actual visual comparison must be done using high-quality printed masters to ensure accuracy. To help you get exactly what you need, let me know:
Perform at least three separate tests for each surface of a particular type or aspect. For any result with a quantity rating of 1 or less, complete at least two additional tests.
She zoomed in on the new chart’s footnote, which she hadn't noticed before. It read: “Note 4: This revised chart supersedes all previous photographic references. Retroactive application is advised for critical assets.” iso 85023 dust level chart pdf updated
: A scale of 0 to 5 based on measured particle diameters. The ISO 8502-3 Dust Level Chart Breakdown
: Heavy dust accumulation. High particle density covering major sections of the tape area.
💡 If the adhesive tape displays an overall, fine discoloration (often reddish-brown from mineral abrasives or black from slag), it indicates an abundance of microscopic dust particles under Cut a piece of tape approximately 200 mm
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.
Remove and discard the first three turns of the specialized adhesive tape to ensure the adhesive is fresh and uncontaminated.
The ISO 8502-3 dust level chart is a visual guide used to classify the dust levels on steel surfaces. The chart provides a reference for assessing the cleanliness of surfaces, which is crucial in ensuring the adhesion and performance of coatings. To help you get exactly what you need,
ISO 8502-3 standard provides a standardized method for assessing the quantity and size of dust on steel surfaces prepared for painting using the pressure-sensitive tape method. ISO - International Organization for Standardization Current Standard Status The most current version of this standard is ISO 8502-3:2017 . While initially published in 2017, it was formally reviewed and confirmed in 2022
High cleanliness; standard requirement for underwater or immersion service.
The uses a 0 to 5 scale to rate the volume of dust covering a specified sample area. Industry specifications usually establish a maximum acceptable rating (typically Rating 1 or 2 for high-performance marine or industrial coatings). Dust Quantity Rating Description / Visual Guide Acceptance Level Rating 0
The standard, titled "Assessment of dust on steel surfaces prepared for painting (pressure-sensitive tape method)," is a critical benchmark in industrial coating to ensure surface cleanliness. The latest version is ISO 8502-3:2017 , which replaced the older 1992 and 2000 versions. The Role of ISO 8502-3 in Surface Preparation
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