Recommended tape and magnifier to be used for assessing the amount of dust on steel surfaces, which have been prepared for painting. It is also known as Test for Assessment of Surface Cleanliness. Dustiness tapes provide pictorial ratings for the assessment of the average quantity of dust as well as descriptive classes for the assessment of the average size of the dust particles.

The method is based on pressing a pressure-sensitive adhesive tape on to the steel surface to be tested. It may be carried out as a "pass/fail" test by comparison with specific limits or by permanently recording the dust present on a surface by mounting the tapes. The tape is pressure sensitive, transparent and correct adhesive strength greater than 190 N / meter to comply with the standard ISO 8502-3. Dust on blast cleaned steel surfaces may reduce the adhesion of applied coatings and by absorbing moisture, may promote the corrosion of the blast cleaned steel. Tape length is supplied in 60 meters rolls. Both the viewing lens and tape are detailed in the ISO 8502-3 standard. This being a visual method of evaluation it is very easy and useful test.