Iso 85023 Dust Level Chart Pdf Updated !full! File

Particles just visible with normal vision (50 µm to 100 µm). Class 3: Clearly visible particles (100 µm to 500 µm). Class 4: Large particles (0.5 mm to 2.5 mm). Class 5: Very large particles (greater than 2.5 mm). Why You Need an Updated PDF Chart

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

Moderate amount of dust; clearly visible to the naked eye. Particles just visible with normal vision (50 µm

It provides a method for assessing the quantity and size of dust particles on steel surfaces after blast cleaning. This is critical because dust left on a surface can significantly reduce the adhesion of paint coatings, leading to premature failure. Class 5: Very large particles (greater than 2

is the internationally recognized standard governing the assessment of dust on blast-cleaned steel surfaces before painting. Dust on a substrate severely weakens coating adhesion. It traps moisture, leading to premature blistering, peeling, and failure of the entire coating system.

Adhering to ISO 8502-3 and using the dust level chart correctly is critical for industries where coating performance is paramount, including:

Substandard cleanliness; requires immediate blowing or vacuuming.