degrees of cleanliness of blast-cleaned surfaces
Key: Steel where mill scale has started to flake and light rustling occurs. 
Key: Steel where all mill scale has flaked off and complete rustling has occured.
Key: Steel where pitting and complete rusting has taken place.
brush-off
Tightly adherent mill scale and rust may remain on the surface. Mill scale and rust are considered adherent if that cannot be removed with a dull putty knife. commercial
Evenly dispersed very light shadows, streaks and discoloration caused by stains of rust and mill scale may remain on no more than 33% of the surface.NEAR-WHITE METAL
Evenly dispersed very light shadows, streaks and discolorations caused by stains of rust and mill scale may remain on 5% of the surface.WHITE METAL
Free of all visible oil, grease, dirt, dust, mill scale and rust.BROWSE BY MATERIAL
BROWSE BY PROCESS
BROWSE BY TYPE