85023 Dust Level Chart Pdf Updated !full! - Iso

Moderate density. Particles are easily visible, covering a noticeable portion of the tape.

Instead of relying on random visual inspections, it utilizes a standardized to extract dust from a substrate. The tape is then attached to a high-contrast backdrop card and cross-referenced with a standardized pictorial rating chart. The Dual-Rating Classification Matrix

| 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 85023 dust level chart pdf updated

Heavy dust cover; significant portions of the adhesive tape are masked. Rejected (Requires mandatory solvent/air blow-off)

The average size of the dust particles is assigned a class from 0 to 5 based on visibility and diameter: Particle Description Typical Diameter No particles visible under 10x magnification 1 Visible under 10x magnification (not to naked eye) 2 Just visible with normal vision 50 μm – 100 μm 3 Clearly visible with normal vision Up to 0.5 mm 4 Clearly visible 0.5 mm – 2.5 mm 5 Clearly visible 2. Dust Quantity Ratings Moderate density

The final result is recorded as a combination of two ratings, for example, . This provides a clear, objective measure of surface cleanliness.

Dust on blast-cleaned steel surfaces reduces coating adhesion, causes osmotic blistering, and creates premature failure points. ISO 8502-3:2017 specifies a method for assessing the quantity and size of dust particles remaining after surface preparation. This paper provides the and interpretation guidelines. The tape is then attached to a high-contrast

ISO 8502-3:2017 was confirmed on June 30, 2022 (designated ISO 8502-3:2017 R2022), confirming its continued relevance and validity. The standard comprises 8 pages and supersedes the earlier 1992 edition. No revision has been published beyond the 2017 edition as of 2026, though the standard remains under the purview of ISO/TC 35/SC 12 (Surface cleanliness).

: Particles clearly visible with normal vision, ranging from in diameter [1.19]. Class 4 : Particles ranging between in diameter [1.19]. Class 5 : Large debris particles greater than in diameter [1.19]. Step-by-Step ISO 8502-3 Test Procedure

The ISO 8502-3 standard defines the following dust levels:

Complete ISO 8502 testing kits are commercially available from various suppliers. A typical kit includes a ×10 magnifier, adhesive tape meeting ISO 8502-3 specifications, a comparator display board with operating instructions, a dust assessment plate, and 25 test record sheets.