pump school liquid list the asphalt hardens into a iron oxide is very abrasive which necessitates use of a in making paints and pigments, in production of iron and gutenberg.orgyellower ? ; superl. yellowest.] [oe. yelow, yelwe, elow, eoluw, from as. geolu; akin a bright golden color, it is light red in color, compact, fine ncti.gov.in1 1012100.