ISO 8502-3. 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) 

Assess the quantity and size of dust particles on steel surfaces prepared for painting. Dust particles on blast-cleaned steel surfaces may reduce the adhesion of applied coatings, and by absorbing moisture may promote the corrosion of the steel surface.
Accumulation of dust particles occurs more naturally on horizontal surfaces, the interior of pipes and in structural cavities. Inspection should be carried out to ensure that such areas are adequately cleaned and free from dust particles before painting.
The pressure-sensitive adhesive tape is pressed on to the steel surface prepared for painting. The tape with the dust particles adhering to it is removed and placed on the Dust Test Chart in a section which contrasts to that of the dust particles and is examined visually.
The quantity of dust particles adhering to the tape and the dust particle size are then compared.
The Dust Test Comparator Chart shows 5 classifications of dust particles and four sections of contrasting backgrounds where the tape can be applied. All details necessary to identify the surface tested can be written on the Chart.
Packing: Dust Test Tape (60m roll), Dust Test Charts (pack of 50) and X10 Illuminated Magnifier.
All items are supplied in a industrial foam filled carrying case.