SBDY-2 data display particle size analyzer can be used to measure the whiteness of the wihte andclose to white material or the surface of the powder.Itcan truiy getvaiue in according tovisual acuity.It can correctly measure paperblur.SBDY-2 can be applied widely in weaveprinting and dyeing oil,paint coating,building,papermould,plastic goods white cement,chinaware,enamel,French chalk,flour,salt,scour,cosmetics.